Every October or November the reproductive swarming of an ocean worm known as the palolo is cause for a Samoan celebration. Fried in oil, baked into bread, or swallowed raw, worm sperm and eggs are a seasonal delicacy here.

Residential energy use in the United States is predicted to increase 25 percent by 2025. A small but increasing share of that power will trickle in from renewable energy sources, experts say.

For the first time in nearly a half century, puffins are returning to Ailsa Craig. The Scottish island is already well-known in the sport of curling as the world's best source of curling stones.

One of the rarest snakes in the U.S., the Louisiana pine snake is relatively abundant on a tract of commercial forest in the state. Scientists hope to learn why.

A politically charged program to poison prairie dogs has begun in South Dakota. Mixed in with the controversy is an endangered ferret and the rights of cattle ranchers.

Birder Mathew Tekulsky recalls how American robins and other species visited his California yard for a few weeks in January, when a pyracantha bush produced its ripe berries.

Scientists are getting to the root of the matter, compiling a fungus "tree of life" that could have health benefits for humans.

It's easy to cut costs by using less energy in your home, says This Old House TV personality Tom Silva. The long-time contractor shares tips on how you can do it.

Take an entrepreneur, add an interesting fact—that coffee grounds release more heat than wood when burned—and what do you get? An environmentally friendly fireplace log made from reused buzz beans.

A new study indicates that very high tides are linked with substantial earthquakes along Earth's continental margins. Does the theory hold water?

The sounds made by dune avalanches has mystified people for centuries. California scientists test an explanation by sliding down the sand on their rear ends.

The decline of domesticated bees threatens North America's food supply. Some researchers believe original wild bee species could come to the rescue.

Thirteen college students are traveling the U.S. by school bus to promote the use of "biodiesel," fuel made from vegetable oil such as that used in fast food restaurants.

Wagari Maathai, recipient of the 2004 Nobel Peace Prize, has long fought—and sometimes suffered—to protect the environment and human rights in Africa. A journalist recalls an encounter with the Kenyan 13 years ago.

Halley's comet won't return until 2061, but pieces of the celestial body are streaking across the sky. The heavenly show, known as the Orionids meteor shower, peaks Wednesday night.