Herbs and spices used to flavor food are also green alternatives to synthetic pesticides, scientists say.

It'll be submarine vs. submarine at a new U.S. war-games zone, but endangered whales may be real casualties, conservationists say. The Navy disagrees, citing safety studies and sailors' needs.

NASA helicopters have lowered about a dozen monitoring "spiders" in and around Mount St. Helens's volcanic crater to better predict major eruptions. Video.

On foot, photographer Joe Riis provides an intimate window on one of North America's longest annual migrations, which is increasingly threatened by fences and highways. Video.

Wasps, flies, and ladybugs are among the natural pest predators being enticed to live on farms to serve as powerful, sustainable weapons against crop destruction.

A hundred meteors an hour may light up the August nights during this year's peak of the Perseid meteor shower, one of the most popular annual sky shows.

Sarah Palin isn't the only one who supports hunting from a helicopter. The Australian government is using choppers with heat sensors to scour the land for invasive fire ants. Video.

Black bears poached in the U.S. for their organs and fluids may gain protection from a proposed federal law—but some experts say the legislation draws attention away from dwindling Asian bears, which are most at risk.

A dolphin hunt in Japan enrages activists. The Cove, an award-winning new movie, condemns it. So why do dolphin hunts go on elsewhere without much controversy?

Drain the ocean and what have you got? For starters, a chasm to rival the Grand Canyon and a mountain taller than Everest--as revealed by accurate, eye-popping new digital illustrations.

Most likely due to an El Niño, no storms have formed at all since the start of this year's hurricane season in June—but experts say there's still time for a whopper to take shape.

A seal hunter bloodies the waters, models strut the world's longest catwalk, mourners remember Hiroshima, and more in this week's best news photos.

Just as Hercules had the multi-headed hydra to contend with, ocean predators tussle with two-headed sea snakes—or so it appears.

Once Earth's fourth largest lake, the Aral Sea has shrunk substantially, with its eastern section losing about 80 percent of its water between 2006 and 2009, new satellite images show.

A new dink frog discovered in southern Costa Rica sports different colors depending on its age and sex—a rare trait among frogs, a new study says.