Scientific American

An ancient sample shows calcite threading through this material’s cracks and pores, offering possible lessons for making modern concrete last longer

This climate system is tied to more powerful typhoons, as well as famine and wildfires

Erythrulose—a sugar found in raspberries—is also prevalent in a giant molecular cloud close to our galaxy’s core, scientists have discovered

New research identifies five distinct sleep subtypes, revealing links between brain patterns, behavior and health

Alpha-gal syndrome is increasing across the U.S., driven by lone star ticks

Cyclosporiasis case numbers have skyrocketed from several dozen nationwide in June to now more than 1,000 in the state of Michigan alone

A 23-year-old student overturned an ancient conjecture about one of math’s simplest operations

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.

A recent study in the journal Nature carries cosmos-quaking implications for our understanding of the universe—except a new preprint says that it’s wrong

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?

Bacteria send protein packages to dormant neighbors to endure antibiotic attack

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

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

The sheer amount of insects that free-range cats consume might surprise you

The U.S. Preventive Services Task Force is an independent group that offers guidance on what health screenings and medications health insurance should cover

Tennis players can return high-speed balls using a combination of reaction and predicting the future

The inaugural launch and first-stage booster recovery of China’s Long March 10B rocket intensifies the nation’s spaceflight rivalry with the U.S.

A strange class of comet could explain the enigmatic behavior of ‘Oumuamua, the first known interstellar object—and even shed light on how Earth became habitable

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

A proposed rule change could expose more Americans to higher doses of radiation from nuclear facilities

Other planets have moons, too. Do they get eclipses like we do?

Efforts to revive the thylacine and woolly mammoth are forcing conservationists to face a long-overdue debate over what kind of natural world we want to build

Living at altitudes with less than half the oxygen at sea level, these mice have adapted to their environment in unique ways

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

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

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

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

As rainfall intensifies with climate change, waste flushed out to sea could attract more sharks, putting beachgoers at risk

This one-ton elephant seal has gone viral for smashing into cars and infrastructure, but biologists have a more poignant explanation for his behavior

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

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

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

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

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

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

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

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

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