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Earth is home to 20 million insect species—three times more than we thought

Some creative calculations using bug traps, epidemiology and trees suggest there are some 20 million unique insect species on Earth

U.S. to Overhaul Radiation Safety Rules to Spur Nuclear Expansion

BRAD PLUMER

The Nuclear Regulatory Commission plans to end longstanding guidance that radiation exposure be “as low as reasonably achievable.”

Global ocean temperatures are entering “uncharted territory,” climate scientists say

Sea surface temperatures in late June reached nearly 70 degrees Fahrenheit on average, shattering records

Ancient cave paintings can harbor human DNA for millennia, scientists find

The breakthrough could reveal previously hidden ancient human activity inside caves, acting as 'genetic archives'

The White House goes all in on aliens with new UAP Science Advisory Council

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

Why digital government records are so hard to preserve

Chat apps, email, and cloud files have become the primary record of how power is exercised. Archivists are trying to preserve them before formats go dark or messages disappear without a trace

How to avoid heat illness and stay safe during the mega heat wave

A heat wave over the Fourth of July weekend could put millions at risk of heat-related illnesses. Here's what to do to stay safe—and why you don't just need to drink lots of water

Male marathoners might be twice as likely to ‘hit the wall’ as women—the reason why might surprise you

The way women use energy while running is fundamentally different from men

NASA needs volunteers to spend a year locked in a Mars simulation

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

Scientists React to the Lab-Made, Yet Lifelike, SpudCell

K. R. CALLAWAY

This cell-like structure can grow, feed, divide and compete. Researchers ponder what it means for the future of synthetic biology and our definition of “life.”

How to Make a Time Capsule That Will Last 250 Years

K. R. CALLAWAY

The America250 time capsule will hold dozens of historical treasures. Avoiding dampness and other dangers requires lots of engineering.