
Turtle Shells Record Nuclear History
Minuscule amounts of uranium detected in the shells of turtles point to a new way to track such materials’ impacts on people and ecosystems
Meghan Bartels is a science journalist based in New York City. She joined Scientific American in 2023 and is now a senior reporter there. Previously, she spent more than four years as a writer and editor at Space.com, as well as nearly a year as a science reporter at Newsweek, where she focused on space and Earth science. Her writing has also appeared in Audubon, Nautilus, Astronomy and Smithsonian, among other publications. She attended Georgetown University and earned a master’s degree in journalism at New York University’s Science, Health and Environmental Reporting Program.

Turtle Shells Record Nuclear History
Minuscule amounts of uranium detected in the shells of turtles point to a new way to track such materials’ impacts on people and ecosystems

Can Russia’s Luna-25 Moon Mission Transcend Earthly Politics?
In the latest chapter of an ongoing “moon rush,” Russia’s Luna-25 mission will attempt the nation’s first lunar landing in nearly 50 years

Fossils Buried in LA Tar Pit Show Why Saber-Toothed Cats Blinked Out of Existence
At Los Angeles’ La Brea Tar Pits, scientists found they could watch large mammals disappear from the fossil record—and could trace the ecosystem through the catastrophe

Americans Have Breathed More Wildfire Smoke in Eight Months Than in Entire Years
Smoke from wildfires that have been exacerbated by climate change is complicating the picture of air pollution in the U.S.

More than Half of Earth’s Species Live Underground
Researchers set out to calculate how much of Earth’s life dwells in the planet’s least admired environment

Bizarre-Looking Colossus Whale May Have Been Heaviest Animal Ever (Sorry, Blue Whales)
“I’ve never seen anything like it,” says a paleontologist not involved in the discovery of a 40-million-year-old fossilized whale

NASA Detects ‘Heartbeat’ from Voyager 2 Spacecraft after Losing Contact
A glitch may have silenced NASA’s Voyager 2 spacecraft until mid-October—but a “heartbeat” signal offers hope for reestablishing contact earlier

Mosquitoes Carry Nasty Diseases. Here’s How to Protect Yourself
Malaria grabs headlines, but U.S. residents are more likely to encounter West Nile virus and other mosquito-borne illnesses

46,000-Year-Old Worm Possibly Revived from Siberian Permafrost
An international team of scientists says nematodes found in Siberian permafrost are 46,000 years old and survived using techniques similar to those of a modern lab favorite

‘Man in the Moon’ Older Than Scientists Thought
Revisiting the precious lunar samples on Earth suggests that some areas of the moon’s surface might be older than scientists once thought

Oppenheimer Almost Discovered Black Holes Before He Became ‘Destroyer of Worlds’
Before leading the Manhattan Project, J. Robert Oppenheimer co-authored a paper explaining that the most massive stars must eventually become what we would now call a black hole

Stunning, Hours-Long Solar Flare Unleashes Plasma Blob
A trio of solar flares from a departing sunspot include one major flare that lasted several hours

Cities Use Spikes to Keep Birds Away. Birds Are Using Them in Nests
Researchers across Europe have found bizarre nests bristling with the sharp metal stakes cities use to repel birds

Can Virtual Reality Mimic Nature’s Power to Make Us Healthier?
Just seeing nature in VR brings some health benefits—and helps scientists learn why we need the real thing

NASA’s Europa Clipper Mission Carries Special Cargo: A Poem
“If, by some chance, there’s another being out there that might connect to it, I wanted them to know that regardless of how it may seem sometimes, we love this Earth,” says poet Ada Limón about her poem

What to Do When You Can’t Fall Asleep May Surprise You
When sleep feels elusive, getting out of bed can calm your mind and help you avoid bad sleep habits

Lightning ‘Megaflashes’ Dozens of Miles Long Are Sparked by These Kinds of Storms
Scientists are beginning to understand what kind of thunderstorm produces so-called megaflashes of lightning that stretch more than 60 miles

How Do CPAP Machines Treat Sleep Apnea?
President Joe Biden has been using a CPAP machine to treat his sleep apnea, according to White House officials. What does that mean?

First Evidence of Giant Gravitational Waves Thrills Astronomers
Astrophysicists are tuning in to a never-before-seen type of gravitational wave spawned by pairs of supermassive black holes

A Potentially Spectacular Comet Will Fly by Earth Next Year
Professional and amateur astronomers alike are hoping that Comet C/2023 A3 will sparkle in Earth’s skies in the fall of 2024, although comets are notoriously difficult to predict

Strange Giant Filaments Reveal a Mystery at the Milky Way’s Heart
Astrophysicist Farhad Yusef-Zadeh has spent decades peering into the center of the Milky Way galaxy, discovering hundreds of enigmatic filaments in the process

What Happened to Imploded Titanic Tourist Sub?
The tourist submersible Titan imploded while diving to visit the wreckage of the Titanic, which sank in 1912

Quantum Light Experiment Proves Photosynthesis Starts with a Single Photon
Scientists have used quantum technology to track individual particles of light as they begin the process of photosynthesis

Scientists Create Human Embryo-Like Structures with Stem Cells
To better understand early pregnancy loss without using actual human embryos, scientists employed stem cells to create models that mimic this stage of development