science

151d

<p>What Major Discoveries Did Isaac Newton Make?</p><p>Sir Isaac Newton is one of the most celebrated English scientists. He was one of the key figures in the Scientific Revolution.</p><p>by Mike Cohen</p><p><a href="https://www.thecollector.com/what-major-discoveries-did-isaac-newton-make/" rel="nofollow" class="ellipsis" title="www.thecollector.com/what-major-discoveries-did-isaac-newton-make/"><span class="invisible">https://</span><span class="ellipsis">www.thecollector.com/what-majo</span><span class="invisible">r-discoveries-did-isaac-newton-make/</span></a></p><p>Newton at PG:<br><a href="https://www.gutenberg.org/ebooks/author/6288" rel="nofollow" class="ellipsis" title="www.gutenberg.org/ebooks/author/6288"><span class="invisible">https://</span><span class="ellipsis">www.gutenberg.org/ebooks/autho</span><span class="invisible">r/6288</span></a></p><p><a href="/tags/books/" rel="tag">#books</a> <a href="/tags/science/" rel="tag">#science</a> <a href="/tags/physics/" rel="tag">#physics</a></p>

Portrait of Sir Isaac Newton. Frontispiece.

Title: Newton's Principia

The mathematical principles of natural philosophy

Author: Isaac Newton

Contributor: N. W. Chittenden

Translator: Andrew Motte

Newton's head slightly turned to his left (the viewer’s right) and his gaze directed upward.

The shoulders and upper chest are draped in classical robes rather than contemporary 17th-century clothing.

The facial expression is calm but determined: firm jaw, pronounced cheekbones, furrowed brow, and wide, intelligent eyes.

https://www.gutenberg.org/cache/epub/76404/pg76404-images.html

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1y

<p><a href="/tags/otd/" rel="tag">#OTD</a> in 1801.</p><p>French astronomer Jean-Louis Pons makes his first comet discovery, jointly attributed to Charles Messier. In the next 27 years he discovers another 36 comets, more than any other person in history.</p><p>He appears to have used telescopes and lenses of his own design; his "Grand Chercheur" ("Great Seeker") seems to have been an instrument with large aperture and short focal length, similar to a "comet seeker".</p><p><a href="https://en.wikipedia.org/wiki/Jean-Louis_Pons" rel="nofollow" class="ellipsis" title="en.wikipedia.org/wiki/Jean-Louis_Pons"><span class="invisible">https://</span><span class="ellipsis">en.wikipedia.org/wiki/Jean-Lou</span><span class="invisible">is_Pons</span></a></p><p><a href="/tags/science/" rel="tag">#science</a> <a href="/tags/astronomy/" rel="tag">#astronomy</a> <a href="/tags/comet/" rel="tag">#comet</a></p>

Portrait of Jean-Louis Pons.

The portrait is painted in a realistic style, capturing fine details in Pons's attire, facial features, and the textures of the objects around him. The overall mood is one of quiet dignity and intellectual pursuit. Pons's expression is thoughtful, perhaps with a hint of satisfaction or curiosity, reflecting his lifelong dedication to astronomy.

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1y

<p>For anyone who needs some relaxing distraction this afternoon, here is a large bubble in a viscous fluid bumping into a smaller one, and forcing it to distort before it engulfs it (taken at the Catalyst science centre in Widnes). I played with this for AGES... so much fun!</p><p><a href="/tags/bubbles/" rel="tag">#bubbles</a> <a href="/tags/science/" rel="tag">#science</a></p>

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150d

<p>Climate change may be outpacing our ability to deal with it using engineering. The third episode of Big Picture Science, tied to the 20th anniversary of the devastating hurricane, “Katrina and the River,” looks at efforts to tame the mighty Mississippi. </p><p>Listen here: <a href="https://bigpicturescience.org/episodes/katrina-and-the-river" rel="nofollow" class="ellipsis" title="bigpicturescience.org/episodes/katrina-and-the-river"><span class="invisible">https://</span><span class="ellipsis">bigpicturescience.org/episodes</span><span class="invisible">/katrina-and-the-river</span></a> </p><p><a href="/tags/podcast/" rel="tag">#podcast</a> <a href="/tags/science/" rel="tag">#science</a></p>

An aeriel view of a small portion of the Mississippi River, seen at twilight.

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1y

<p>"In my view, all that is necessary for faith is the belief that by doing our best we shall succeed in our aims: the improvement of mankind."</p><p>Happy birthday Rosalind Franklin!</p><p>Her work was central to the understanding of the molecular structure of DNA. Though she was recognized for her other work in her time, her work on DNA was not appreciated until after her death.</p><p><a href="https://en.wikipedia.org/wiki/Rosalind_Franklin" rel="nofollow" class="ellipsis" title="en.wikipedia.org/wiki/Rosalind_Franklin"><span class="invisible">https://</span><span class="ellipsis">en.wikipedia.org/wiki/Rosalind</span><span class="invisible">_Franklin</span></a></p><p>The Rosalind Franklin question.<br><a href="https://physicsworld.com/a/the-rosalind-franklin-question/?utm_campaign=PW-FB-PHL-072424&utm_medium=social&utm_source=facebook" rel="nofollow" class="ellipsis" title="physicsworld.com/a/the-rosalind-franklin-question/?utm_campaign=PW-FB-PHL-072424&utm_medium=social&utm_source=facebook"><span class="invisible">https://</span><span class="ellipsis">physicsworld.com/a/the-rosalin</span><span class="invisible">d-franklin-question/?utm_campaign=PW-FB-PHL-072424&utm_medium=social&utm_source=facebook</span></a></p><p><a href="/tags/science/" rel="tag">#science</a> <a href="/tags/crystallography/" rel="tag">#crystallography</a> <a href="/tags/womeninscience/" rel="tag">#womeninscience</a></p>

Rosalind Franklin with microscope in 1955.
MRC Laboratory of Molecular Biology

The photograph is from 1955, during the peak of Franklin’s research career. This period was marked by significant advancements in molecular biology and the study of DNA.

Rosalind Franklin, the pioneering scientist known for her crucial contributions to the discovery of the DNA double helix structure, is depicted in this photograph. She is seen sitting or standing at a laboratory bench, intently working with a microscope.

$X-ray diffraction image of the double helix structure of the DNA molecule, taken 1952 by Raymond Gosling, commonly referred to as "Photo 51", during his work with Rosalind Franklin on the structure of DNA. Photograph 51 is an X-ray diffraction image of DNA, famously taken by Rosalind Franklin. The image reveals a series of dark, X-shaped patterns made by X-ray beams scattering off a crystallized sample of DNA. The photograph displays a distinct cross pattern in the center, surrounded by concentric rings. This pattern indicates the helical structure of DNA. The X-shaped diffraction pattern is characteristic of a helical structure, specifically suggesting the presence of a double helix. The image is marked by varying shades of black and gray, highlighting the intensity of the diffracted X-rays at different angles. The clear definition of the cross pattern is crucial, as it provides insight into the periodicity and symmetry of the DNA structure.$

Edited 1y ago

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1y

<p>THIS should be front-page news every day.</p><p>THIS should be the primary focus of every major world leader. </p><p>But it's not. </p><p>Instead, all we get is month after month of more Business As Usual.</p><p>‼️ 🚨 ‼️ 🚨 ‼️ 🚨 ‼️ 🚨 ‼️ 🚨 ‼️</p><p>Dr. Robert Rohde (<span class="h-card"><a href="https://fediscience.org/@RARohde" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>RARohde</span></a></span>) delivers the latest update on our global climate emergency:</p><p>"The last 12 months were each at least 1.5°C (2.7°F) warmer than Berkeley Earth's 1850-1900 baseline. This brings the 12-month moving average of Earth's global temperature to a record high of +1.68°C (+3.02°F) above the 1850-1900 baseline, far surpassing previous short-term warming events."</p><p>See ➡️ <a href="https://fediscience.org/@RARohde/112824106977970378" rel="nofollow" class="ellipsis" title="fediscience.org/@RARohde/112824106977970378"><span class="invisible">https://</span><span class="ellipsis">fediscience.org/@RARohde/11282</span><span class="invisible">4106977970378</span></a><br>Learn more ➡️ <a href="https://berkeleyearth.org/june-2024-temperature-update/" rel="nofollow" class="ellipsis" title="berkeleyearth.org/june-2024-temperature-update/"><span class="invisible">https://</span><span class="ellipsis">berkeleyearth.org/june-2024-te</span><span class="invisible">mperature-update/</span></a></p><p><a href="/tags/science/" rel="tag">#Science</a> <a href="/tags/environment/" rel="tag">#Environment</a> <a href="/tags/climate/" rel="tag">#Climate</a> <a href="/tags/climatechange/" rel="tag">#ClimateChange</a> <a href="/tags/climatecrisis/" rel="tag">#ClimateCrisis</a> <a href="/tags/climateemergency/" rel="tag">#ClimateEmergency</a></p>

Line graph shows global monthly temperature anomaly from 1850 through the present. The trend is mostly steady until about 1940 when it starts a slow upward trend which steepens starting around 1980 and reaches an all-time high in June 2024 of more than 1.6° C above the pre-industrial average.

A series of lines shows global warming by month for every year from 1850 through the present. At the top, the warmest months are all from the past two years, with 2024 setting records every single month.

Line graph shows 12-month moving average of the global mean temperature from 1850 through the present. The trend is mostly smooth until about 1960 when it starts an upward trend that reaches an all-time high in June 2024 of 1.68° C above the pre-industrial average.

Edited 1y ago

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1y

<p><a href="/tags/otd/" rel="tag">#OTD</a> in 1918.</p><p>Emmy Noether's paper, which became known as Noether's theorem was presented at Göttingen, Germany, from which conservation laws are deduced for symmetries of angular momentum, linear momentum, and energy.</p><p>This is the first of two theorems (see Noether's second theorem) proven by mathematician Emmy Noether in 1915 and published in 1918.</p><p><a href="https://en.wikipedia.org/wiki/Noether%27s_theorem" rel="nofollow" class="ellipsis" title="en.wikipedia.org/wiki/Noether%27s_theorem"><span class="invisible">https://</span><span class="ellipsis">en.wikipedia.org/wiki/Noether%</span><span class="invisible">27s_theorem</span></a></p><p>Noether's second theorem:<br><a href="https://en.wikipedia.org/wiki/Noether%27s_second_theorem" rel="nofollow" class="ellipsis" title="en.wikipedia.org/wiki/Noether%27s_second_theorem"><span class="invisible">https://</span><span class="ellipsis">en.wikipedia.org/wiki/Noether%</span><span class="invisible">27s_second_theorem</span></a></p><p><a href="/tags/science/" rel="tag">#science</a> <a href="/tags/mathematics/" rel="tag">#mathematics</a></p>

First page of Emmy Noether's article "Invariante Variationsprobleme" (1918), where she proved her theorem.
Emmy Noether - "Invariante Variationsprobleme" (Nachrichten von der Gesellschaft der Wissenschaften zu Göttingen, Mathematisch-Physikalische Klasse 1918 (1918): 235-257. <http://eudml.org/doc/59024>)

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151d

<p>SETI Institute In the News 2025: October Roundup</p><p>Throughout October, the SETI Institute was featured across leading science and media outlets, underscoring its continued leadership in research, innovation, and public engagement. From advising Disney/Pixar on the science behind Elio to contributing expert analysis on Martian dust dynamics, SETI Institute scientists help bring complex discoveries to a global audience. </p><p>Read the full stories: <a href="https://www.seti.org/news/seti-institute-in-the-news-2025-october-roundup/" rel="nofollow" class="ellipsis" title="www.seti.org/news/seti-institute-in-the-news-2025-october-roundup/"><span class="invisible">https://</span><span class="ellipsis">www.seti.org/news/seti-institu</span><span class="invisible">te-in-the-news-2025-october-roundup/</span></a></p><p><a href="/tags/science/" rel="tag">#science</a> <a href="/tags/space/" rel="tag">#space</a></p>

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151d

<p>In a recent episode of SETI Live, SETI Institute Deputy Director Dr. Simon Steel spoke with astronomer Dr. Melissa McClure of Leiden University about a groundbreaking discovery: the earliest stages of planet formation caught in action.</p><p>The finding, published in Nature, marks the first direct evidence of hot mineral condensation in a protoplanetary system at such an early stage. </p><p>Learn more: <a href="https://www.seti.org/news/birth-of-planets-jwst-spots-hot-mineral-condensation-in-a-proto-stellar-system/" rel="nofollow" class="ellipsis" title="www.seti.org/news/birth-of-planets-jwst-spots-hot-mineral-condensation-in-a-proto-stellar-system/"><span class="invisible">https://</span><span class="ellipsis">www.seti.org/news/birth-of-pla</span><span class="invisible">nets-jwst-spots-hot-mineral-condensation-in-a-proto-stellar-system/</span></a></p><p><a href="/tags/space/" rel="tag">#space</a> <a href="/tags/science/" rel="tag">#science</a></p>

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151d

<p>Next <a href="/tags/setilive/" rel="tag">#SETILive</a>: TRAPPIST‑1 e Revealed<br>Peering Inside an Exoplanet’s Atmosphere </p><p>TODAY, 6 November, 10 am PST / 1 pm EDT</p><p>Join SETI Live host Moiya McTier with Néstor Espinoza (STScI) and Ana Glidden (MIT) for a deep dive into the latest JWST observations of TRAPPIST‑1 e, one of the most tantalizing Earth-sized planets in the habitable zone of a nearby star.</p><p>WATCH LIVE: <a href="https://youtube.com/live/wQfR7yn82CY" rel="nofollow"><span class="invisible">https://</span>youtube.com/live/wQfR7yn82CY</a> </p><p><a href="/tags/space/" rel="tag">#space</a> <a href="/tags/science/" rel="tag">#science</a> <a href="/tags/exoplanets/" rel="tag">#exoplanets</a></p>

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33d

<p><a href="/tags/ppod/" rel="tag">#PPOD</a>: NASA’s JWST provided the first vertical view of Uranus’s ionosphere in this image released on Feb. 19, 2026, revealing auroras shaped by its tilted magnetic field.</p><p>Getting a look at the structure of the region where the atmosphere interacts strongly with the planet’s magnetic field is giving us the most detailed portrait yet of where its auroras form, how the magnetic field influences them, and also data on how Uranus’s atmosphere has continued to cool since the 1990s.</p><p><a href="/tags/space/" rel="tag">#space</a> <a href="/tags/science/" rel="tag">#science</a></p>

Uranus seen in infrared by JWST. The center of the planet is bright blue, with a dark blue band slightly offset to the upper right. A red band encircles the entire planet, although it is also slightly thicker in the upper right. Several bright spots are visible in the red band to either side of the bottom, and one bright spot is see in the dark blue band at about the 2 o'clock position. Gray bands of the planet's ring structure circle the entire ice giant, from the thickest and furthest out to three thinner, fainter bands moving inward.

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150d

<p>Science history: The Tacoma Narrows Bridge collapses, forcing a complete rethink in structural engineering — Nov. 7, 1940</p><p>By Tia Ghose </p><p>"One morning, the Tacoma Narrows Bridge began bouncing up and down and twisting to and fro before ultimately collapsing into the Puget Sound."</p><p><a href="https://www.livescience.com/technology/engineering/science-history-the-tacoma-narrows-bridge-collapses-forcing-a-complete-rethink-in-structural-engineering-nov-7-1940" rel="nofollow" class="ellipsis" title="www.livescience.com/technology/engineering/science-history-the-tacoma-narrows-bridge-collapses-forcing-a-complete-rethink-in-structural-engineering-nov-7-1940"><span class="invisible">https://</span><span class="ellipsis">www.livescience.com/technology</span><span class="invisible">/engineering/science-history-the-tacoma-narrows-bridge-collapses-forcing-a-complete-rethink-in-structural-engineering-nov-7-1940</span></a></p><p><a href="/tags/science/" rel="tag">#science</a> <a href="/tags/engineering/" rel="tag">#engineering</a></p>

"Photo of the Tacoma Narrows Bridge collapsing, 7 November 1940, filmed by Barney Elliot. "

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1y

<p>Norwegian mathematician Niels Henrik Abel was born <a href="/tags/otd/" rel="tag">#OTD</a> in 1802.</p><p>His most famous single result is the first complete proof demonstrating the impossibility of solving the general quintic equation in radicals. This question was one of the outstanding open problems of his day, and had been unresolved for over 250 years. He was also an innovator in the field of elliptic functions and the discoverer of Abelian functions. </p><p><a href="https://en.wikipedia.org/wiki/Niels_Henrik_Abel" rel="nofollow" class="ellipsis" title="en.wikipedia.org/wiki/Niels_Henrik_Abel"><span class="invisible">https://</span><span class="ellipsis">en.wikipedia.org/wiki/Niels_He</span><span class="invisible">nrik_Abel</span></a></p><p><a href="/tags/science/" rel="tag">#science</a> <a href="/tags/mathematics/" rel="tag">#mathematics</a></p>

Portrait of Niels Henrik Abel
by Johan Gørbitz

Abel's face is portrayed with a serious and focused expression, his eyes gazing slightly away from the viewer, suggesting deep thought or reflection.

He is dressed in early 19th-century clothing, typical of an educated individual of his time. The attire is formal, often including a high-collared shirt and a dark coat.

Page from notebook of Niels Henrik Abel

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149d

<p>This week's comic is about how easily conventional wisdom gets turned on its head by bad faith actors, especially in a media environment lacking responsible editors.</p><p><a href="/tags/health/" rel="tag">#health</a> <a href="/tags/science/" rel="tag">#science</a> <a href="/tags/food/" rel="tag">#food</a> <a href="/tags/consumers/" rel="tag">#consumers</a> <a href="/tags/media/" rel="tag">#media</a> <a href="/tags/disinformation/" rel="tag">#disinformation</a></p>

Lead and Circuses

A RECENT CONSUMER REPORTS STUDY FOUND HIGH LEVELS OF LEAD IN SEVERAL PROTEIN DRINK MIXES. HOW MIGHT THIS PLAY OUT?

INITIAL ALARM

Guy drinking Alpha Boar Plus Protein Blast drink: GLUG GLUG GLUG!

THEY FOUND WHAT?

PODCAST TOPIC

The BIFF and BRAD SHOW

Podcaster 1: LEAD IS STRONG METAL, MAKE MAN MORE STRONG.

Podcaster 2: ROMAN GLADIATORS, LIKE, CHUGGED LEAD.

GOVERNMENT ENDORSEMENT

FDA official: WE ENCOURAGE AMERICANS TO CONSUME AS MUCH LEAD AS POSSIBLE, AND OTHER HEAVY METALS TOO.

In front of him are product containers: PRE- 1978 PAINT CHIPS Smoothie-Ready!

ARSENIC GEL

Cadmium Chews

LEAD-FREE FOOD BANNED

Corporate guy: FINALLY OUR CHILDREN WILL GET THIS DELICIOUS, NUTRITIOUS METAL IN EVERY BITE!

©2025 Jen Sorensen

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1y

<p>The five scholars who won two Nobel prizes – and what sets them apart.</p><p>There is often much debate about who is the greatest among sportsmen and women, movie stars, leaders or artists. But some scholars have truly made a staggering difference to the world.</p><p>By Sam McKee via @ConversationUK </p><p><a href="https://theconversation.com/the-five-scholars-who-won-two-nobel-prizes-and-what-sets-them-apart-234146" rel="nofollow" class="ellipsis" title="theconversation.com/the-five-scholars-who-won-two-nobel-prizes-and-what-sets-them-apart-234146"><span class="invisible">https://</span><span class="ellipsis">theconversation.com/the-five-s</span><span class="invisible">cholars-who-won-two-nobel-prizes-and-what-sets-them-apart-234146</span></a></p><p><a href="/tags/science/" rel="tag">#science</a> <a href="/tags/nobelprize/" rel="tag">#nobelprize</a></p>

Photo of Marie Curie. Everett Collection.

Marie Curie is depicted with a serious expression, reflecting her dedication and deep involvement in her scientific work. The photograph emphasizes her role as a trailblazer in an era when women in science were a rarity, and her legacy as a role model for future generations of scientists.

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1y

<p><a href="/tags/otd/" rel="tag">#OTD</a> in 1876.</p><p>Thomas Edison receives a patent for his mimeograph.</p><p>Mimeographs, along with spirit duplicators and hectographs, were common technologies for printing small quantities of a document, as in office work, classroom materials, and church bulletins. For even smaller quantities, up to about five, a typist would use carbon paper.</p><p><a href="https://en.wikipedia.org/wiki/Mimeograph" rel="nofollow" class="ellipsis" title="en.wikipedia.org/wiki/Mimeograph"><span class="invisible">https://</span><span class="ellipsis">en.wikipedia.org/wiki/Mimeogra</span><span class="invisible">ph</span></a></p><p><a href="/tags/science/" rel="tag">#science</a> <a href="/tags/technology/" rel="tag">#technology</a> <a href="/tags/printingdevices/" rel="tag">#printingdevices</a></p>

1918 illustration of a mimeograph machine

H05K3/1233 Methods or means for supplying the conductive material and for forcing it through the screen or stencil.

US patent 180,857 for “Improvement in Autographic Printing” was filed on 13 March 1876 and issued to Edison on 8 August 1876. Electric pen No. 1 Outfit at Greenfield Village at the Henry Ford museum. the Menlo Park Laboratory there.

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1y

<p>NEW from my lab in Ecology Letters: Machine learning trained on >10k iNaturalist records let us "hindcast" Joshua trees' flowering back over the 20th Century. The hindcast recovers flowering events recorded in field notes, herbarium records, and newspaper archives. Joshua trees now flower a bit more often than they once did— but that's probably not good for the trees overall</p><p>OA paper: <a href="https://doi.org/10.1111/ele.14478" rel="nofollow"><span class="invisible">https://</span>doi.org/10.1111/ele.14478</a></p><p>Explainer: <a href="https://lab.jbyoder.org/2024/08/05/new-publication-how-a-century-of-climate-change-affected-joshua-tree-flowering/" rel="nofollow" class="ellipsis" title="lab.jbyoder.org/2024/08/05/new-publication-how-a-century-of-climate-change-affected-joshua-tree-flowering/"><span class="invisible">https://</span><span class="ellipsis">lab.jbyoder.org/2024/08/05/new</span><span class="invisible">-publication-how-a-century-of-climate-change-affected-joshua-tree-flowering/</span></a></p><p><a href="/tags/science/" rel="tag">#science</a> <a href="/tags/ecology/" rel="tag">#ecology</a> <a href="/tags/climatechange/" rel="tag">#ClimateChange</a> <a href="/tags/joshuatrees/" rel="tag">#JoshuaTrees</a></p>

A western Joshua tree with a straight trunk and rounded crown, bearing many clusters of green-white flowers, framed against a clear blue sky

Low-quality scans of two old newspaper photos, of a 1920s Cadillac parked on a desert hillside. In one panel, flowering Hesperoyuccas are visible; in the other panel, a woman reaches out of the car to examine a big cluster of fruits hanging from a Joshua tree

A map of Joshua trees' range in the Mojave Desert, shaded by estimated frequency of flowering over the hindcast from 1900 to 2022, with darker green high-frequency shading in the south and west

A map of Joshua trees' range in the Mojave Desert, shaded to reflect differences in hindcast flowering years from the early 20th Century (1900-1929) and recently (1990-2019), with green shading indicating increased frequency of flowering in the south and west and north-central; and purple indicating reduced frequency of flowering in the low-lying west and northwest

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1y

<p>South African botanist and taxonomist Louisa Bolus was born <a href="/tags/otd/" rel="tag">#OTD</a> in 1877.</p><p>She is known for her extensive work in the field of South African flora, particularly in the classification and description of new plant species. Her extensive collection and classification efforts greatly expanded the Bolus Herbarium, making it one of the most important botanical collections in the region.</p><p><a href="https://en.wikipedia.org/wiki/Louisa_Bolus" rel="nofollow" class="ellipsis" title="en.wikipedia.org/wiki/Louisa_Bolus"><span class="invisible">https://</span><span class="ellipsis">en.wikipedia.org/wiki/Louisa_B</span><span class="invisible">olus</span></a></p><p><a href="/tags/science/" rel="tag">#science</a> <a href="/tags/botany/" rel="tag">#botany</a> <a href="/tags/womeninscience/" rel="tag">#womeninscience</a></p>

Portrait of Louisa Bolus.

Louisa Bolus is presented in a modest, professional attire suitable for a botanist and academic of her time.

She is likely dressed in a high-collared blouse or dress, possibly with a jacket or shawl, reflecting the fashion of the late 19th and early 20th centuries.

Her hair is probably neatly styled, either pulled back or in a simple updo, indicating her practical approach to her work.

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147d

<p>I find this remarkable:</p><p>The Dresden Codex, one of the few surviving Mayan manuscripts, contains tables that give highly accurate timings of solar eclipses over more than 700 years, from 350 CE to the 12 century. </p><p><a href="https://www.science.org/doi/10.1126/sciadv.adt9039" rel="nofollow" class="ellipsis" title="www.science.org/doi/10.1126/sciadv.adt9039"><span class="invisible">https://</span><span class="ellipsis">www.science.org/doi/10.1126/sc</span><span class="invisible">iadv.adt9039</span></a> <a href="/tags/history/" rel="tag">#history</a> <a href="/tags/science/" rel="tag">#science</a> <a href="/tags/astronomy/" rel="tag">#astronomy</a></p>

Sheets of the Dresden Codex depicting eclipses, multiplication tables, and the flood.

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1y

<p>Stunning images of Jupiter captured by the Juno spacecraft during a close flyby in October 2018.</p><p>Video credit: NASA/JPL-Caltech/SwRI/MSSS/Gerald Eichstädt<br><a href="/tags/space/" rel="tag">#space</a> <a href="/tags/science/" rel="tag">#science</a> <a href="/tags/nasa/" rel="tag">#nasa</a></p>

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1y

<p><a href="/tags/otd/" rel="tag">#OTD</a> in 1576.</p><p>The cornerstone for Tycho Brahe's Uranienborg observatory is laid on the island of Hven.</p><p>It was the first custom-built observatory in modern Europe, and the last to be built without a telescope as its primary instrument. Brahe abandoned Uranienborg and Stjerneborg in 1597 after he fell out of favour with the Danish king, Christian IV of Denmark; Brahe left the country, and the institution was destroyed in 1601 after his death.</p><p><a href="https://en.wikipedia.org/wiki/Uraniborg" rel="nofollow" class="ellipsis" title="en.wikipedia.org/wiki/Uraniborg"><span class="invisible">https://</span><span class="ellipsis">en.wikipedia.org/wiki/Uranibor</span><span class="invisible">g</span></a></p><p><a href="/tags/science/" rel="tag">#science</a> <a href="/tags/astronomy/" rel="tag">#astronomy</a></p>

Orthographic illustration of Tycho Brahe's Uraniborg palace-observatory from his 1598 book Astronomiæ instauratæ mechanica

Tycho's Wall Quadrant. An engraving of Tycho Brahe in his Uraniborg observatory on the island of Hven, probably from the 1598 printing of his Astronomiae instauratae mechanica, hand coloured. The engraving shows the painting above the quadrant that Brahe had commissioned to be made in 1587 by the painters Hans Knieper, Hans van Steenwinckel the Elder and Tobias Gemperle who were responsible, respectively, for the painting of the landscape at the top, the three arches representing the three areas of Uraniborg and the portrait of Brahe.

Tycho Brahe - Tycho Brahe: Astronomiae Instauratae Mechanica. Wandsbek 1598

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155d

<p>1) Why do you love plants and how do you interact with plants in your life (intentionally/background)?</p><p>2) What makes learning about plants/ecology accessible/inaccessible to you (ie compare with birding)?</p><p>3) Do you prefer a formal or informal teaching environment, and why?</p><p>4) What are some subtopics relating to native plants that are of interest to you?</p><p>5) Would you prefer to learn to ID plants with or without phone apps?</p><p>6) How many plants would you be comfortable learning to ID in a 1 hour session?</p><p><a href="/tags/plants/" rel="tag">#Plants</a> <a href="/tags/ecology/" rel="tag">#Ecology</a> <a href="/tags/education/" rel="tag">#Education</a> <a href="/tags/gardening/" rel="tag">#Gardening</a> <a href="/tags/askfedi/" rel="tag">#AskFedi</a> <a href="/tags/conservation/" rel="tag">#Conservation</a> <a href="/tags/teaching/" rel="tag">#Teaching</a> <a href="/tags/environment/" rel="tag">#Environment</a> <a href="/tags/science/" rel="tag">#Science</a></p>

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1y

<p>PRESS RELEASE: <a href="https://www.seti.org/royal-commission-alula-collaborates-seti-institute-support-development-alula-manara-observatory" rel="nofollow" class="ellipsis" title="www.seti.org/royal-commission-alula-collaborates-seti-institute-support-development-alula-manara-observatory"><span class="invisible">https://</span><span class="ellipsis">www.seti.org/royal-commission-</span><span class="invisible">alula-collaborates-seti-institute-support-development-alula-manara-observatory</span></a></p><p>The Royal Commission for AlUla (RCU) and SETI Institute announced their collaboration agreement as part of a long-term vision to further the development of AlUla Manara Observatory as a leading destination of the future, for space research, discovery and astro-tourism.</p><p><a href="/tags/astronomy/" rel="tag">#astronomy</a> <a href="/tags/science/" rel="tag">#science</a> <a href="/tags/scicomm/" rel="tag">#scicomm</a></p>

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115d

<p>The lightest and most abundant gas in the universe is hydrogen. How scientists figured out how it powers the stars, and the history of other invisible gases in our atmosphere, on this week’s Big Picture Science, “A Real Gas.” </p><p>Listen here: <a href="https://bigpicturescience.org/episodes/a-real-gas" rel="nofollow" class="ellipsis" title="bigpicturescience.org/episodes/a-real-gas"><span class="invisible">https://</span><span class="ellipsis">bigpicturescience.org/episodes</span><span class="invisible">/a-real-gas</span></a> </p><p><a href="/tags/science/" rel="tag">#science</a> <a href="/tags/podcast/" rel="tag">#podcast</a></p>

An underwater scene full of bubbles of various sizes, all colored in purple.

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1y

<p>Greenpeace is being sued for $300 million. It's an attempt by the capitalist establishment to permanently silence them.<br>______________________________</p><p>Energy Transfer, the Big Oil company behind the Dakota Access Pipeline, claims that Greenpeace USA and Greenpeace International organized the 2016-2017 Standing Rock resistance. This is a false and racist attempt to erase Indigenous leadership from this historic protest.</p><p>The trial begins in February 2025. If we lose, Greenpeace USA could face financial ruin, ending over 50 years of environmental activism. But this is bigger than just us.</p><p>Energy Transfer’s lawsuit threatens our fundamental rights to organize and protest. A win for them sets a dangerous precedent – allowing more attacks on unions, activists, and journalists – and silencing our speech through intimidation.<br>______________________________</p><p>LEARN MORE -- <a href="https://greenpeaceontrial.org/" rel="nofollow"><span class="invisible">https://</span>greenpeaceontrial.org/</a></p><p><a href="/tags/usa/" rel="tag">#USA</a> <a href="/tags/science/" rel="tag">#Science</a> <a href="/tags/environment/" rel="tag">#Environment</a> <a href="/tags/climate/" rel="tag">#Climate</a> <a href="/tags/climatechange/" rel="tag">#ClimateChange</a></p>

Screenshot from top of linked website. Title says "Greenpeace is being sued for $300 million." A graphic collage shows a courtroom along with protesters being muted.

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