On the last day of #WomensHistoryMonth, we're sharing the story of a female first! Object 7 in our #Carnegie125 series is the first known spectrographic plate taken by a woman at Mount Wilson Observatory. Meet Jennie Belle Lasby: https://bit.ly/4s5yFfI #WomensHistoryMonth

Great science begins with great questions. We spoke with some of the researchers at Carnegie Science who are working to make sure more people get the chance to ask them! Read the full Q&A 👇 bit.ly/4sTbSoL

For the first time, astronomers, including Carnegie's Jeff Rich, used galactic archaeology techniques to trace the chemical "fossil record" of a galaxy outside our own Milky Way. 🔗 https://bit.ly/4tczfJz #CarnegieAstronomy #CarnegieObservatories

#ICYMI: Carnegie astrobiologist @Miquai visited our friends at @SciFri to talk about the biology of @ProjectHailMary. 🪨 #Amaze “Things like body plans, what kind of symmetry you have, those could be locked in early on due to a chance mutation." https://bit.ly/4s3aWwO

Start your week off w/ one of the biggest mysteries in our universe! Join us as Carnegie's Andrew Robertson shines a light on #DarkMatter. 📅 3/30 @ 7pm PT 📍@TheHuntington—San Marino, CA #AstronomyLectureSeries Can't make it? Follow along online👇 carnegiescience.edu/shining-light-dark-matter

Some of us doodle cubes & daisies. Vera Rubin, unsurprisingly, doodled galaxies. Object 6 in our #Carnegie125 series is a page of spiral doodles from the Carnegie astronomer who showed dark matter exists—w/ clues about her day hidden in the margins. #WomensHistory More details 👉 bit.ly/3NLEAIL

Object 5 | Carnegie's Dr. Elizabeth Ramsey spent nearly 60 years becoming one of the world's foremost authorities on the human placenta. This diagram of placental circulation by Ranice W. Crosby captures her work. 👇 bit.ly/4cQp4pl

Pi shows up anywhere nature curves, rotates, or radiates. When you study everything from Earth's core to exoplanets to how plants grow, it's basically everywhere. Happy #PiDay from Carnegie Science. 🥧

🚀 The Earth & Planets Laboratory is headed to #AwesomeCon2026, and this year, YOU'RE in the captain's chair! Ask smart questions. Read the clues. Trust your gut. Then commit to a space mission…without knowing where you're going. 🗓 Friday, March 13 | 🕑 1:30–2:15 PM | 📍 Room 206 | bit.ly/4bfHpcW

Meet Henrietta Swope—the Carnegie astronomer whose science and quiet generosity are still shaping discoveries today. 🔗 https://bit.ly/4sELyOI #WomensHistoryMonth #WomeninSTEM

🤯 Water may be more common than we ever imagined! Tune in next Monday as Carnegie's Anat Shahar walks us through her groundbreaking research showing how water could form naturally in a planet's early years. 📅 March 16 | 7:00 PM PT 📍 The Huntington, San Marino, CA 🔗 https://bit.ly/4s1wPxp

Every time we point #JWST at something, the universe surprises us. Here are six of the wildest discoveries so far—from teenage galaxies to diamond rain. 🔭 👉 carnegiescience.edu/six-wild-discoveries-jwst

What are distant worlds made of? Carnegie’s new Henrietta Infrared Spectrograph will help answer that—bringing alien planets into sharper focus than ever before. Read the story ↓ https://carnegiescience.edu/unveiling-atmospheres-distant-worlds

It's #WomensHistoryMonth, and we're kicking it off with object No. 3 in our #Carnegie125 series: a $1,000 grant application that helped change biology forever. 🔗 carnegiescience.edu/nettie-steve...

This Monday (3/2), we're kicking off our #AstronomyLectureSeries at The Huntington w/ ULTRAVIOLET SUSPECTS. Go back in time with #CarnegieObservatories' Tony Pahl, who uses UV light from early galaxies to uncover the universe's dramatic beginnings. Learn more 👉 bit.ly/4qZEZow #HuntingtonLecture

"Yes, I'm always a fan of drama." - Shreyas Vissapragada, Hale Scholar, Carnegie Science Vissapragada's research aims to uncover the complex life stories of exoplanets—and he has a particular interest in worlds with dramatic backstories. Q&A: carnegiescience.edu/wanted-exopl...

🤯 What if there's a missing law of nature? Join @CarnegiePlanets' Bob Hazen & Mike Wong as they unveil their new book Time's Second Arrow—moderated by NPR Short Wave's Regina Barber. 🏆 Win a signed copy! 📅 3/18 | 6:30 PM ET 📍Washington, D.C. 🎟️ https://bit.ly/4cELw4w

💘 Mission Matchmaker puts YOU in charge of designing a space mission...before you know where it's going! Ask smart questions, read the signs, and try not to catch feelings for the wrong asteroid. 📅 Mon, March 23 | Caveat NYC 🎟️ carnegiescience.edu/mission-matchmaker

Four free lectures. Four of astronomy's biggest mysteries. One science-packed spring! The 24th season of our popular #AstronomyLectureSeries starts March 2—and you won't want to miss a single one! 📍 The Huntington | San Marino, CA 🔗 Reserve your spot (they go fast!)—bit.ly/3ZMPDUD

Object 2 | The Yale Embryo In 1932, Elizabeth Ramsey discovered a 14-day-old embryo so tiny (2.75 mm) it was mistaken for an insect. The embryo became a cornerstone of our Carnegie Collection & launched Ramsey's 60-year career. #Carnegie125 👉 https://bit.ly/4agmaZh

💕Science + Valentine's Day = the perfect equation! Download our collection of #ScienceValentines and share the love (of discovery) with your statistically significant other. From lava puns to dark matter romance, we've got you covered. 🌋✨ https://bit.ly/3MxAByV

Introducing our new monthly roundup showcasing groundbreaking research from Carnegie Science! This month: coral heat tolerance, CRISPR in symbiotic worms, hidden magma beneath Oregon volcanoes, pristine organics from asteroid Bennu, and galaxies from cosmic dawn. https://bit.ly/3Mq3ux6

World-class science depends on world-class tools—and the world-class people who keep them running! Meet Lori Willhite, who recently led a major renovation of the geochemistry & mass spectrometry lab at Carnegie Science’s Earth and Planets Laboratory. 🔗 bit.ly/4rf8KTy

“We contend that evolution is a universal phenomenon, in play since the Big Bang.” In Time’s Second Arrow, Carnegie's Robert Hazen and Michael Wong argue that complex systems—from atoms to life—evolve toward greater functional information. 🔗 Learn more: bit.ly/3Oe9U2M #TimesSecondArrow

Nature runs on laws—motion, energy, heat. But what about complexity? Carnegie's Robert Hazen and Michael L. Wong think it needs a law of its own. Read more: https://bit.ly/3Oe9U2M #TimesSecondArrow

"Out just in time to make the perfect Valentine’s Day gift for science-minded nerds who like to ponder life’s big questions." @carnegiescience.bsky.social with gift ideas AND the back story on TIME'S SECOND ARROW, in stores 2/10. carnegiescience.edu/does-time-ha...

#CarnegieScienceDay may be over—but the science never stops! Subscribe to our newsletter for breaking science news, deep dives with scientists, sneak peeks, upcoming events, and more—all delivered straight to your inbox. 👉📬 bit.ly/49OvC5Y

We’re kicking off the countdown to #Carnegie125 next year! To celebrate, we're opening the archives to share 125 objects that tell our story of scientific excellence. 📸 Object 1 On this day in 1902, Andrew Carnegie convened our first Board of Trustees—founding Carnegie Science. #HBDCarnegieScience

🎉 It’s #CarnegieScienceDay! For 124 years, we’ve advanced discovery by bringing together ideas, disciplines, and people to study humanity’s biggest questions. Because breakthroughs don't come from staying in one lane. Explore how → bit.ly/carnegie-science-day #HBDCarnegieScience

They're not like us! More than 6K exoplanets have been discovered—and many don’t resemble anything in our Solar System. Carnegie astronomer Shreyas Vissapragada explores exoplanet atmospheres to uncover the clues to habitability. 👉 bit.ly/49LwV5B #HBDCarnegieScience

“No organisms in this world live by themselves.” Carnegie scientist Yixian Zheng studies how 🪸 depend on 🦠 living inside their cells—and what happens when that partnership breaks down. https://bit.ly/4a8jRq2

Martian rocks, coral symbionts, and more! We’re adding new content throughout the week as we count down to #CarnegieScienceDay. Head to the landing page to see what's new👇 bit.ly/carnegie-science-day #HBDCarnegieScience | 🎂 January 29

New stories, fresh perspectives, and behind-the-scenes science are live on our #CarnegieScienceDay landing page. (There's more on the way, so stay tuned!) ✨ bit.ly/carnegie-science-day #HBDCarnegieScience | 🎂 January 29

Leading up to #CarnegieScienceDay, we’re diving into some big questions, starting with one of the biggest—How did we get here? Carnegie's Andrew Steele talks about the search for life on Mars & what it can tell us about life itself. https://bit.ly/4rcNFs6 #HBDCarnegieScience

✨ From star stuff to 🧬 life itself, Carnegie Science is built for big questions. Carnegie President John Mulchaey on what makes Carnegie so special. https://carnegiescience.edu/carnegie-science-day/what-makes-carnegie-so-special #HBDCarnegieScience #CarnegieScienceDay | 🎂 January 29

👐 Life leaves fingerprints. From ancient photosynthesis to modern symbioses, Carnegie scientists study how life reshapes its environment in lasting ways—and how those signals can guide the search for life beyond Earth. Keep exploring: https://bit.ly/4jXFmOJ #HBDCarnegieScience | 🎂 January 29

Not every planet becomes a home for life. 🌍 From stellar activity to planetary chemistry and geologic history, Carnegie scientists study the forces that determine whether life can take hold. 👉 carnegiescience.edu/planets-life-humanitys-oldest-question #CarnegieScienceDay #HBDCarnegieScience

A world isn’t built in a day! We’re starting the countdown to #CarnegieScienceDay with "star stuff" and the cosmic processes that create the conditions and raw materials for planets, life, and ✨ life elsewhere. ✨ 👉 https://bit.ly/stars-to-planets #HBDCarnegieScience | 🎂 January 29

🎉 Next Thursday (1/29), Carnegie Science turns 124—and we’ll be celebrating all week! We’re kicking off the 2nd annual Carnegie Science Day w/ stories, video interviews, & questions that span from star stuff to life & back again. Stay tuned! 👉 bit.ly/carnegie-science-day #HBDCarnegieScience

With #NVIDIARubin making headlines this month, here’s a reminder of just how far #VeraRubin’s legacy reaches across science, space, and culture. Read more 👇 https://carnegiescience.edu/news/what-else-named-after-carnegie-astronomer-vera-rubin #VeraRubin #DarkMatter #WomenInScience #Astronomy

Did you know some stars come with their own "space weather stations?" This morning at #AAS247, Carnegie’s Luke Bouma shared how these features—found around ~10% of young M dwarf stars—can help reveal how stars shape the habitability of their planets. Read more👇 carnegiescience.edu/naturally-oc...

Calling all CA-based undergrads. It's time to apply for #CASSI 2026! CASSI interns spend 10 weeks of their summer at the @CarnegieScience Observatories exploring the cosmos alongside world-class scientists. Apply Today👇 carnegiescience.edu/cassi

🎉 Congratulations to Carnegie geochemist Steven Shirey, who received the @agu.org's 2025 Harry H. Hess Medal last night at #AGU25. A well-deserved honor recognizing Shirey’s lifetime contributions to understanding Earth’s evolution. 🌍🔬 https://bit.ly/4pLFrqX

A Carnegie-led team of astronomers has reported the strongest evidence yet for an atmosphere on a rocky exoplanet—and it's in a place no one expected. (🧵) 🔗 carnegiescience.edu/ultra-hot-lava-world-has-thick-atmosphere-upending-expectations

Undergrads, this could be you! Applications are officially open for #EPIIC2026. 📌 Earth & Planets Laboratory (in D.C.) 📆 June 1 - August 7 🔬 Hands-on research in planetary science, geophysics, geochemistry, & more 💪 Professional development & mentorship Learn more & apply👇 https://bit.ly/4oOlRZy

POV: You walk into a physics lab and see someone firing protons...at frog eggs? Welcome to Carnegie in the 1940s, where nuclear physics smashed into biology and sparked a whole new field. #ScienceHistory https://carnegiescience.edu/news/atoms-cells-history-biophysics-section

When a group of nuclear physicists decided to study life instead of atoms, everything changed. Their interdisciplinary leap helped shape the rise of modern molecular biology. Here’s how it happened ↓ https://carnegiescience.edu/news/atoms-cells-history-biophysics-section

We’re excited to announce that astronomer Michael R. Blanton has been named the 12th Director of the Carnegie Science Observatories! He joins us from New York University, where he served as Director of the Center for Cosmology and Particle Physics. (1/5) Full Press Release👇 buff.ly/JZ0J81w

New PNAS study shows that life’s signature lingers in rocks long after the original biomolecules are gone. Hazen, Wong (@miquai.bsky.social) & Prabhu (@anirudhprabhu.bsky.social) found chemical traces of ancient life in 3.3 BYO rocks. Let’s get into it. (1/6) 👉 carnegiescience.edu/chemical-evi...

Great to join @miquai.bsky.social and the folks at @carnegiescience.bsky.social this morning to talk about Ripples on the Cosmic Ocean and, among other things, the existential risk of #SolarStorms. Check out Mike’s forthcoming book - an argument for a new force of nature! #Space