It's easy to imagine the Arctic ice cap as it looks on a globe -- pinned firmly to one spot. However, that's not the case. Sea ice is free to roam when it breaks up, bobbing out of the Arctic Ocean through straits that head toward the Atlantic and Pacific. Normally, natural ice dams, or [...

Researchers at the Wildlife Conservation Society (WCS) have found the breeding area of the elusive large-billed reed warbler. That's a big deal, because according to BirdLife International, the species is the world's "least-known bird." The distinction may sound ominous, but it's als...

Like many folks, I truly dislike dwelling much on the 9-11 attacks. The memories are too painful. What we all saw that day is deeply seared into our collective memory and we will never forget. But what I feared most as I watched those towers fall was not another attack. It was America's reacti...

Increasing land use and global warming will deal a devastating one-two punch to tropical forests by the end of the century. In some areas, plant and animal diversity will plummet by the year 2100.

A video by a Japanese artist captures the entire history of nuclear explosions on Earth.

Grasses are taking advantage of the warming Antarctic climate. Are weeds next?

Giant, extinction-sized asteroids hurtling into Earth may grab headlines and star in Hollywood blockbusters, but airbursts from smaller asteroids and comets are thought to occur once every 500-1,000 years, making them one of the most pressing threats to humanity from space. That makes the discovery...

What do you get when you cross aboriginal wisdom with Google Maps? Newly discovered meteor impact craters, of course! Duane Hamacher studies aboriginal astronomy as MacQuarie University in Sydney; already a very cool job. But things got even better when Hamacher followed up on a legend of the Arrer...