Earth

Animals

Census of the oceans

Ten years of work reveals new species, amazing diversity.

Environment

Gulf oil finds many paths

Questions, and lots of oil, remain months after Gulf disaster.

Environment

The oily Gulf

The Gulf oil spill is massive, will take years to clean up.

Life

The algae invasion

One of the world's simplest organisms is also one of the hardest to classify.

Climate

Explainer: Global warming and the greenhouse effect

Like the glass-walled greenhouses used to grow out-of-season plants, certain gases in Earth’s atmosphere trap the sun’s energy near the planet’s surface. This keeps Earth warm enough for life to flourish.

Environment

Indoor ozone stopper

Oils from human skin fight off this harmful chemical, but at a cost.

Environment

When frog gender flips

With weed killer in the water, some males acquire female traits.

Earth

Earthquake shortens the day

The recent South American quake sent Earth spinning just a big faster.

Earth

Watering the air

Crop irrigation and farming practices could mean a cooler, wetter Midwest.

Environment

A global warming flap

Differences in butterfly and moth breeding patterns are linked to a changing climate.

Environment

Pollution at the ends of the Earth

Chemicals are turning up in small Arctic villages far from factories and cities.

Environment

Watching out for vultures

Farmers giving medicine to cows are accidentally poisoning vultures, again.