
To align Coordinated Universal Time with Earth’s rotation, a second occasionally gets added to the year. That may change in 2027

To align Coordinated Universal Time with Earth’s rotation, a second occasionally gets added to the year. That may change in 2027

The sport supplement is popular among health influencers and athletes, who say creatine can help build stronger muscles and sharper brains—but is it legit?

A rare eruption in the Indian Ocean let researchers capture one of the clearest views yet of a seafloor spreading event

China’s Tianwen-2 aims to collect samples from asteroid Kamo’oalewa and return them to Earth

Pigeons seem to defy a century-old psychology law about how rewards and consequences help us learn

A controversial geoengineering proposal suggests that brightening clouds off South America could weaken a burgeoning El Niño, but major technical and ethical questions remain

The exoplanet telescope TESS revealed a distant world using an entirely different detection method than the one it was built around

Anthropeum is a daily game that uses the Met’s open-access data to showcase underrepresented art and artifacts

A best-yet measurement of one of general relativity’s most mind-boggling effects is “another feather in Einstein’s cap”

Reliance on artificial-intelligence tools degrades the abilities of physicians and software engineers, studies show

Steel support columns in the Midtown building, which is being converted from offices into apartments, may have been overloaded, experts say

Start your morning with today’s Spellements. Create as many words as you can from our daily selection of letters—including one tied to recent science news. Play now.

Some IVF clinics are using AI to perform tasks such as sperm and embryo selection, but some fertility experts question whether the technology will lead to more live births

Working memory is the information we need to access to complete the tasks we’re engaged in right now, and scientists think it may be closely entwined with consciousness

During World War II, statistics helped the Allies estimate the number of enemy tanks, which proved essential in the decisive move against Nazi Germany

Both Neanderthals and Homo sapiens may have shared tools and behavioral practices, new research suggests
“I've lived in Northern Illinois all my life and have been a birder for decades. Yet, there are a few birds that I feel I should have seen by now. They've just eluded me. Each May though, I'm filled with new hope. Cerulean Warbler, Connecticut Warbler, Olive-sided Flycatcher, Philadelphia Vireo all come to mind.”
— Vince S

Female mammals have long thought to be born with all the eggs they would ever have, but new research is challenging that consensus

Probing the dawn of the cosmos for clues to how the first galaxies and supermassive black holes formed is no easy feat

Getting as little as 90 minutes less sleep than usual may lead to gaining weight and becoming more sedentary, a new study finds

Training people to pay attention to the right visual cues nearly doubled how accurately they could spot AI-generated faces

The Big Apple’s biannual sunset display is as iconic as it is captivating. Here’s everything you need to know about why the phenomenon happens and how best to view it

New archaeology has uncovered everything from musket balls to wig curlers at the site of the Battle of Bunker Hill, the first major clash of the American Revolution

Presenting our inaugural class of Young American Scientists: 28 researchers who are redefining the future of science. For early-career scientists, it's a tumultuous time of funding cuts and general uncertainty. Their dedication and optimism, however, provide plenty of reason for hope.
Elsewhere in the issue: Labs That Run Themselves | How to Fix Science | Craig Venter's Final Interview

The space agency has put out a call for its Moon & Mars Exploration Analog, which recreates the challenges of a long-duration space mission

The rocket's red glare has nothing on these images from Chandra X-ray Observatory

The moon is Earth’s constant companion. But will that always be the case?

Totality in the Mediterranean with Clara Moskowitz

Trying to kill algae with chemicals is a common response when community ponds or other water features go green, but a freshwater ecologist says there may be safer and more effective solutions

The hominins may have gone on adventures, but they lacked key skills of modern humans

People in the U.S. experience more, and more intense, heat waves than the Founding Fathers would have

Noether's work helped prove the conservation of energy in physics, a key foundation for Einstein's theory of relativity

Two people were the first to receive the therapy for a condition that damages the spinal cord and optic nerve

This new group, which is led by Harvard professor Avi Loeb, aims to advise the Trump administration and the U.S. intelligence community, as well as to publish its findings in peer-reviewed journals

Poor preparation and a failure to properly apply the coating may be just a few of the reasons why the Reflecting Pool’s new paint job appears to be peeling off

Knowing what kind of tick bit you and where you got it can help inform next steps

A new study claims that the universe isn’t entirely the same no matter where you look—a radical proposal

Fathers show changes in some of the same brain areas as mothers, but the effect of parenthood on dads isn’t nearly as well studied

The Trump administration wanted the surface of the Lincoln Memorial Reflecting Pool to be “American flag blue.” A water-treatment expert explains why the pool is still algal green and why the bloom could keep coming back

This operation opens the door to treating more people living with HIV who have end-stage organ disease