Happy Earth Day! 🌍 We've got several stories @sciam.bsky.social, including a look I took at where some blast-from-the-past environmental issues stand. (Hint: not all are in the past, though there has definitely been progress.) 🧪

Get in on it!!!!!

It's happening—we're about 2 hours away from the Artemis II mission splashdown! Here's a timeline of what to expect. Watch and follow @sciam.bsky.social for live updates (and s/o to @unamandita.bsky.social for the graphic!): tinyurl.com/443kra4s

Now on @sciam.bsky.social: Some ask, “what’s the science value of Artemis II?” Most answers focus on learning about the moon or human health there. But the best answer, IMO, involves lunar astronomy, which is where Artemis could be a true game changer. www.scientificamerican.com/article/nasa...

🌑 ☀️ After hearing how astounded the Artemis II crew was by the total solar eclipse they experienced near the moon last night, we can finally get a hint of what they saw. Read more: www.scientificamerican.com/article/nasa...

If you're just catching up on the Artemis II mission, today is MOON DAY—when the Orion spacecraft will officially round the moon. Follow @sciam.bsky.social for live updates, new records, and major milestones: www.scientificamerican.com/article/nasa...

We can have nice things! Follow SciAm's coverage as #Artemis II astronauts near an historic milestone and likely stunning pics ... of the far side of the moon. @sciam.bsky.social @meghanbartels.bsky.social @jackiefmogensen.bsky.social @clairehcameron.bsky.social @leebillings.bsky.social

🚀🌔 Stunning views from NASA’s Artemis II mission and the International Space Station showcase Earth, the moon and even Venus, captured during humanity’s first crewed lunar mission since 1972. 🚀🌔 Follow all our mission coverage here: spklr.io/6001EyN07

The third day of the Artemis II mission was relatively quiet, as four astronauts trek out to fly around the moon

The EPA and HHS are pushing an initiative to remove microplastics from drinking water and our bodies. Scientists and policy experts say reducing plastics is generally a good move, but question if current tech and infrastructure could actually pull it off. My reporting today on @sciam.bsky.social

🚀 Artemis II is safely in orbit! 🚀 A daring 10-day voyage will take four astronauts on a loop around the moon and set the stage for future forays to the lunar surface

The Arctic sea ice maximum this year effectively tied for the lowest ever on record, with major implications for polar ecosystems and global warming

Researchers put human sperm inside a uterus-like simulation under zero gravity conditions. It did not go well! New on @sciam.bsky.social! www.scientificamerican.com/article/huma...

Mathematicians can't agree on whether 0.999... equals 1 www.scientificamerican.com/article/math...

Journalists: Please consider donating to the Kim Wall Memorial Fund. Today would've been Kim's 39th birthday, and the latest Fund grantees have been announced! Even in what feels like a difficult moment for reporting, let this be some light. Lift each other up. ✌️ www.iwmf.org/programs/kim...

Just how massive can a star get? Pretty danged massive... but it depends on when you look. A thing I wrote for Scientiifc American, just like I do every Friday! www.scientificamerican.com/article/what... 🔭🧪

If you, like me, have never really thought about your thymus, new research demands your attention! This little known organ may be vital to longevity. Read why in @sciam.bsky.social www.scientificamerican.com/article/this...

Listening to the Jonathan Haidts of the world, it's easy to get sucked into the idea that kids today are not ok. But the (admittedly sparse) evidence doesn't back that up: by many measures, kids are actually doing better now. Read why in @sciam.bsky.social www.scientificamerican.com/article/the-...

A federal judge temporarily blocked RFK's efforts to overhaul the childhood vaccine schedule and appoint new ACIP members, @clairehcameron.bsky.social reports : www.scientificamerican.com/article/rfk-...

Author @michaelpollan.bsky.social has spent decades exploring what it means to be human. In his new book A World Appears, he takes on one of the biggest questions in science and philosophy: what consciousness is—or isn’t. Hear more: www.scientificamerican.com/podcast/epis...

Satellites are wonders of modern technology that have improved all of our lives. But having more than a million of them in orbit could destroy our view of the heavens and seriously damage our planet

Are you conscious? Are you...sure? I asked Michael Pollan, author of WHEN THE WORLD APPEARS, how he knew if I was conscious and when we'll know if AI is conscious. Check out our conversation here 🧠 www.scientificamerican.com/podcast/epis...

We spoke to @michaelpollan.bsky.social about consciousness, AI, and why when another conscious being actually does come our way, we might have no idea. Now on @sciam.bsky.social www.scientificamerican.com/article/mich...

The U.S. has reported more than 1,000 measles cases in 2026—and we're just two months into the year. That's nearly half of all the cases reported in 2025. And public health experts say it's a sign that the U.S. has likely lost its measles elimination status. My reporting for @sciam.bsky.social:

This announcement was NOT on my bingo card!

Now on @sciam.bsky.social: What’s behind Trump’s order to declassify U.S. government documents about aliens and UFOs? How are scientists actually searching for ET? What happens next? Here’s what some real experts have to say. www.scientificamerican.com/article/trum...

FDA backtracks and agrees to review Moderna's mRNA flu vaccine after all. @clairehcameron.bsky.social explains on @sciam.bsky.social www.scientificamerican.com/article/fda-...

Extremely important and critical science. www.scientificamerican.com/article/how-...

Come for the scandal, stay for the science.

It's the Winter Olympics, which always brings stories detailing what Olympians eat. But food lists and diets aren’t actually as important as this: Olympians simply need to eat enough. What it takes to eat like an Olympian, now on @sciam.bsky.social! www.scientificamerican.com/article/what...

🏴󠁧󠁢󠁳󠁣󠁴󠁿

The first time I came across a ketogenic diet as a therapy was for Dravet syndrome, a seizure disorder. And now, RFK Jr. is touting it as a possible cure for schizophrenia. The research just doesn't back that up, but its more nuanced than you might think. www.scientificamerican.com/article/rfk-...

So snakes keep turning up in places they should not be in India and it turns out they may be accidentally hoping a ride on trains. (And yes, I am pretty proud of this headline.) 🧪

“Seeing is not just what our eyes physically see,” says Sandra Ristovska, an associate professor of media studies at the University of Colorado Boulder, “but also the experiences and ideas that viewers bring to images."

The, er, thing below is called a Prototaxite. Turns out it may be a new branch of life. That is extremely cool and I have absolutely no idea why you are laughing... 🧪

Now on @sciam.bsky.social: Artemis II—humankind's first crewed voyage to the moon in more than a half-century—is at last almost ready to launch, and NASA revealed some new details about the mission in a press conference earlier today. Check it out! www.scientificamerican.com/article/nasa...

Astronauts evacuated from the ISS splashed down early this morning. Asked if NASA will release more info about the medical situation that triggered their evacuation, Jared Isaacman said NASA is “very committed to being transparent.” More: www.scientificamerican.com/article/evac...

Today in unique experimental set ups: Horses that were presented with cotton pads soaked in a scared human’s sweat showed more signs of fear themselves www.scientificamerican.com/article/hors...

How prepared are ISS astronauts to deal with medical emergencies and problems in space? Had a fascinating day reporting out this story! New on @sciam.bsky.social www.scientificamerican.com/article/how-...

Breaking: NASA is going to evacuate four astronauts from the ISS after one fell sick with an unknown medical issue. This has never happened before. www.scientificamerican.com/article/in-u...

Thinking about welcoming the new year with a polar plunge? Here's what science has to say about the practice

The brutal respiratory infection has infected tens of thousands and killed at least 13 people in the U.S. in 2025

GLP-1s are about to become so much more ubiquitous.

There's hope for me yet.

Lawmakers just confirmed Jared Isaacman as the new head of NASA. One wonders what this means for the agency's space science and exploration programs... New on @sciam.bsky.social ---->

Astronomers have discovered a bizarre lemon-shaped exoplanet orbiting a dense, rapidly spinning dead star. But those details are perhaps the least weird thing about it. Latest in @sciam.bsky.social! www.scientificamerican.com/article/scie...

RFK, Jr.–Backed Lyme Disease Conspiracy Theory May Be Probed under New Bill www.scientificamerican.com/article/rfk-... President Donald Trump is expected to sign a defense bill this week that orders an investigation into whether the U.S. military bioengineered Lyme disease

“In my career, I have seen children with hepatitis B. I’ve seen children die of liver failure, which is a horrible death. I would never wish this on anybody,” say Yvonne Maldonado, Stanford pediatrician. These risks have now increased under the new ACIP vaccine vote today. More @sciam.bsky.social:

It's been thought since the early 70s that eukaryotes (basically any life with a cell nucleus) wouldn't survive above 62C and no complex life had been shown living above 60C. Until the "fire amoeba"... 🧪 (These are some of my favorite stories to write, just weird neat stuff we're learning.)

Unsure what to get your loved ones — or yourself — for the holidays? @sciam.bsky.social subs are currently half off! Consider subscribing and supporting original, thought-provoking and delightful journalism. ✌️ www.scientificamerican.com/getsciam/