. Atmospheric CO2 (pCO2) level through Phanerozoic

Comparison between modeled and proxy-derived ranges of atmospheric pCO during the Phanerozoic

"These results highlight the key role of outgassing and deep Earth processes in influencing pCO2 variation and climate dynamics with implications for understanding historical climate variations"
www.sciencedirect.com/science/arti...
🧪 ⚒️ #Geology #Paleobio #Climate

This is Earth as photographed by the Apollo 17 crew on December 7, 1972. The whole planet pretty much fills the picture — you see the deep blue oceans, those swirling white clouds, and Africa standing out as this big brown landmass right from the center to the upper left. It’s the famous Blue Marble shot. Credit: NASA

Full view of Earth from the Orion spacecraft during Artemis II. Pale blue planet with white clouds, Africa visible on the left with the Iberian Peninsula twinkling with city lights along the curved edge. A soft green aurora glows near the top right. Taken against the blackness of space. Credit: NASA/Reid Wiseman

From #Apollo (left) to #Artemis (right), two glances at our only home, 54 years apart.

One was our Blue Marble — full and vibrant.

The other seems like a tiny, solitary jewel in the black cosmic ocean.

Yet it’s always the same #Earth. The same heartbeat.

That’s us… in both.❤️

🔭 🧪

Illustration of the solar system with planet orbits, surrounded by a blue donut cloud of asteroids. Rays of turquoise dots in the front half of the donut show thousands of objects revealed by Rubin.

Introducing over 11,000 new members of the Solar System...and our main survey hasn't quite started yet! ☄️

Using pre-survey observations from 2025, NSF–DOE Rubin Observatory scientists have reported more than 11,000 new asteroids and comets! 🔭🧪

🔗: rubinobservatory.org/news/11000-n...

Records shattered as summer heat hits Southwest in March; 'This is what climate change looks like' Scientists say a record-smashing March heat wave in the U.S. Southwest shows climate change is already driving more dangerous weather extremes.

Records shattered as summer heat hits Southwest in March; ‘This is what climate change looks like’

The Southwest can cope with deadly heat, but not months early, like 110°F (43.3 Celsius) in the Arizona desert on Thursday, setting a new March high temp record in the US.
🧪
apnews.com/article/heat...

Des études très courtes et un nombre limité de participants .

Un échantillon de 216 participants recrutés via Amazon Mechanical Turk a complété des questionnaires sur l'orientation politique, les connaissances politiques et le style cognitif, ainsi qu'un test de précision du contrôle métacognitif politique, entre février 2021 et mars 2022.

People with the least political knowledge tend to be the most overconfident in their grasp of facts People often misjudge their understanding of verifiable political facts. A new study published in the Journal of Experimental Psychology: Applied provides evidence that individuals with the least actu...

Nothing surprising here…

#MedSky 🧪

www.psypost.org/people-with-...

Cover of "Picture an Astronomer: Best Practices for Retaining Talent in Astrophysics", which features an illustration of a 19-year-old Vera Rubin looking through a telescope over a backdrop of a first light image of spiral galaxies from the Rubin Observatory.

Happy International Women's Day!

Perfect time for me to (re)share our white paper on increasing the retention of women in professional astrophysics (really full of suggestions that broaden participation in academic science in general).

arxiv.org/abs/2512.24465

🧪🔭☄️👩‍🔬

Infographic highlighting the contributions of twelve women in chemistry history. Full alt-text available at the link in the post.

On #InternationalWomensDay, here's another edition of Women in Chemistry History. This edition features women whose achievements in chemistry include the creation of synthetic emeralds, the impact of diet on intelligence and health, and more: www.compoundchem.com/2026/03/08/i...

#ChemSky 🧪

Is it really a war?

Play along with Andrew Heaton's new game show.

ESCAPADE spacecraft are now flying through Earth’s magnetotail With their instruments now fired up and recording data, the twin ESCAPADE satellites are undertaking a test run before they head to Mars later this year. On Wednesday, Mar. 4, they will plow throug…

ESCAPADE spacecraft are now flying through Earth’s magnetotail

Launched to Mars in November, NASA’s ESCAPADE probes - operated by @ucbssl.bsky.social - are now testing their instruments in a never-before-visited region of Earth’s magnetic field.

www.ssl.berkeley.edu/escapade-mag...

🧪🔭 #ESCAPADE

J'ai toujours été prudent quant à l’idée d’une accélération du réchauffement mondial. À partir de maintenant, je ne le serai plus.
1/6

Iran war threatens global helium supply Attacks on Qatar and the Strait of Hormuz remove one-third of the world’s helium from the market

The war in Iran has taken one-third of the world’s helium supply off the market. And if the conflict continues for more than 2 weeks, disruption for helium users could take months to resolve.

#chemsky 🧪

Photographic portrait of H by Julia Margaret Cameron. Wikipedia.

John Herschel was born OTD in 1792.

His 1831 Preliminary Discourse launched a flowering of reflection on the aims and methods of science among British thinkers that was so rich and influential that Charles Sanders Peirce would later dub it “the Age of Method.”

🧪#HistSTM #PhilSci 🐋🌱

Photograph of Fay Ajzenberg-Selove

For #WomensHistoryMonth: Let us celebrate the life and accomplishments of experimental physicist Fay Ajzenberg-Selove (1926-2012). An expert on the lighter atomic nuclei, she had many notable triumphs in the struggle to improve the standing of women in physics. 🎢⚛️🧪 #WomenInSTEM 🧵1/n

This view shows puffing dust bubbles and an erupting gas shell — the final acts of a monster star. It is about the star AG Carinae. The image showcases the details of the ionised hydrogen and ionised nitrogen emissions from the nebula (seen here in red). The blue demonstrates the contrasting appearance of the distribution of the dust that shines of reflected stellar light. Astronomers believe that the dust bubbles and filaments formed within and were shaped by powerful stellar wind . The star is surrounded by an expanding shell of gas and dust — a nebula — that is shaped by the powerful winds emanating from the star. The nebula is about five light-years wide, equal to the distance from here to our nearest star, Alpha Centauri.

🧵
#Hubble celebrated its 31st anniversary with this impressive view of AG Carinae, a luminous blue variable (LBV) 20,000 ly away in the constellation Carina.

Credit: ESA/Hubble and NASA, A. Nota, C. Britt 🔭 🧪 ⚛️

➡️ esahubble.org/images/potw2...

#universe #space #astronomy #stellarastro #science 1/3

3D images shows several small mounds rising above the surface of Mars near an area called Hypanis Valles. The scene is less than 5 km, or 3 miles, across.

HiRISE 3D: Candidate Landing Site near Hypanis Valles

If a rover were to land here, our 3D image can help with assessing how well it could traverse the terrain.

www.uahirise.org/anaglyph/ESP_037717_1920...
NASA/JPL-Caltech/University of Arizona
#Mars #NASA #science

Featured Image: Rare Giant Galaxies How do giant low-surface-brightness galaxies form? New research investigates two galactic specimens to search for clues.

How do giant low-surface-brightness galaxies form? New research investigates two galactic specimens to search for clues. aasnova.org/2026/02/23/f... 🔭🧪

NASA’s latest telescope is a feat of early-career leadership The Pandora satellite provides career training grounds while observing exoplanets.

Nature wrote an article about my role on NASA’s Pandora mission! Aside from being a cutting-edge exoplanet explorer, Pandora serves as a way for early career folks to gain hands-on experience serving in mission leadership roles. Read about it here:🧪🔭

www.nature.com/articles/d41...

⚫ Du «Parrain» à «M.A.S.H.» ou «Apocalypse Now», Robert Duvall a incarné de sa puissance discrète tous les rôles de l’Amérique profonde, au long d’une carrière à la longévité exceptionnelle.

Il est mort dimanche 15 février à l’âge de 95 ans.

➡️ bit.ly/4chhTX5

Headline: Macklin Celebrini’s Olympic Success Is Surreal Even for His Dad. A photo shows Macklin Celebrini of Team Canada playing hockey.

From @theathletic.com: “They wouldn’t bring me all that way not to play me, right?”

Canadian teenager Macklin Celebrini went from wondering if he would play to scoring four goals through three games in his debut Olympics. nyti.ms/4qIU7Xx

🧵
Are we at a breakthrough in VUV laser tech?

It seems so: nuclear clocks could be way more accurate than what we have now, leading to substantial advantages.

Read the following. 1/3

⚛️ 🧪 #physics #science #laser #technology #clock

#JWST infrared deep field: golden-white distant galaxies on black space. Central soft blue #Chandra glow marks hot gas around a tight group of young galaxies. Brightest one has big diffraction spikes. Possibly the earliest protocluster seen—only ~1 billion years post-Big Bang.

🧵
Here comes a jaw-dropping discovery: the most distant confirmed protocluster ever seen with X-rays! 🔭 ⚛️

Using #JWST & #Chandra together, astronomers spotted JADES-ID1—a massive structure in the making that’s forcing us to rethink how fast the cosmos grew up. 🧪

#cosmology #space #astronomy 1/10

Image cutout shows a pedestal crater on the surface of Mars. The ejecta blanket from the original impact is still visible around the crater, because it was more resistant to erosion than the surrounding terrain.

A closeup of the impact crater. The crater rim is very eroded and there are numerous large boulders around the crater.

HiPOD: About a Pedestal Crater

The objective of this observation is to examine a pedestal crater here in Deuteronilus Mensae. A pedestal crater is when the ejecta from an impact settles and is more erosion-resistant than the surrounding terrain.

https://uahirise.org/hipod/ESP_076643_2260
#Mars

Miranda Revisited

Remastered Voyager 2 images show Uranus's moon Miranda. Its fractured surface suggests a past liquid water ocean may be slowly freezing beneath the ice. This makes Miranda a significant target in the search for water and potential life.

Credit: NASA/ APOD

Hey Martians, did I mention we now also have a video of epic Phobos passing over a Martian dust storm near Pavonis Mons? 🌪️🌋🥔

Video & full info: flic.kr/p/2rNN8wk
Credit: ESA/DLR/FUBerlin/AndreaLuck CC BY

@esa.int Mars Express HRSC
300 MP Photo quoted below
Easy zoom: easyzoom.com/image/674026

This is the most detailed map yet of dark matter in the universe, based on JWST observations of 800,000 galaxies.

The background image shows those galaxies in infrared light. Yellow indicates the location of dark matter, inferred from its gravitational pull. 🧪🔭

www.nasa.gov/missions/web...

Shadowy Italian Alps peaks below a deep inky-blue sky full of sharp stars. Andromeda glows softly in the middle as a big oval patch, brighter at the center, fading into a hazy ring.

🧵
This amazing pic by Matteo Dunchi features the Andromeda Galaxy (M31), rising over the Italian Alps in July 2015.

Although M31 appears in the sky as a faint and fuzzy blob to the unaided eye, its light is about 2.5 Myr old, making it likely the oldest...

➡️ apod.nasa.gov/apod/ap15081...

🔭 🧪 1/8

A photo of the man murdered by ICE today, just before the shooting. He’s standing and holding a phone in his right hand and holding his empty left hand to the sky and looking behind him at a woman running away while an ICE agent closes in on him from the front. On the ground behind the man is a woman that the victim will soon try to help, leading several ICE agents to attack him and pin him to the ground, before shooting him several times.

We’re supposed to believe this is a domestic terrorist attacking ICE with a gun