Earth

Earth

Lopsided lights

Simultaneous snapshots reveal that northern and southern auroras aren’t always alike.

Earth

A hundred new nukes?

Here are some issues to contemplate while deciding whether to welcome the nuclear-power renaissance that Sen. Alexander has just proposed.

Earth

Signs of ancient sea ice

New analyses of Arctic seafloor sediments suggest floating ice debuted in the ocean at least 47.5 million years ago.

Earth

Arctic images declassified

High-res Arctic sea images should be declassified, says National Research Council.

Earth

Bird deaths blamed on vitamin deficiency

Shortage of thiamine may have been killing birds in the Baltic and possibly elsewhere for some 25 years.

Earth

Erosion, on the down low

Experiments show how microscopic fungi attack minerals to begin the erosion process.

Humans

What’s in your bottled water?

A congressional hearing found bottled-water quality is not regulated as strictly as tap water is.

Humans

Court backs EPA on controlling airborne particles

Upwind polluters can be held responsible for contributing to downwinders' violations of air-pollution standards.

Animals

Megafish Sleuth: No Steve Irwin

There's no reason a scientist can't be an action hero — even if his damsels in distress have fins.

Earth

Monster stingrays: Field notes from a global wrangler

A megafish biologist shares what he's learning about a rare freshwater species.

Health & Medicine

Bad Breath

New studies detail how the invisible particles that pollute the air can damage heart, lungs and genetic programming.

Earth

New cyclone predictor

Researchers link occasional sea-surface warming in central Pacific with more, stronger hurricanes in North Atlantic.