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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.

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.”

Archaeologists uncover new history from the Battle of Bunker Hill, the first major battle of the American Revolution

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 Lincoln Memorial Reflecting Pool’s algae problem has better solutions than hydrogen peroxide, experts say

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 biological dogma that women don’t make new eggs after birth may be wrong

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

What will happen to the moon in the far future?

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

July 4 heat wave would've been 'virtually impossible' in 1776

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

NASA Aims to Catch a Falling Space Telescope and Push It Back Up

KENNETH CHANG

Without a rescue mission, NASA’s Swift Observatory, which studies some of the most powerful explosions in the universe, will burn up in the atmosphere within a few months.

A Mission to Save NASA’s Swift Telescope Launches to Orbit

KENNETH CHANG

A refrigerator-size spacecraft will try to grab onto Swift and nudge it to a higher orbit, enabling it to continue observing powerful cosmic explosions.

Ancient ‘hobbits’ feasted on Komodo dragons’ leftovers

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

Cheating Chickadees Are Seduced by Smarts

ANNIE ROTH

Female mountain chickadees are loyal to their mates, unless a smarter suitor comes along.

How working memory could give rise to consciousness

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