Earth
- 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.
-
- Earth
Earthquake shortens the day
The recent South American quake sent Earth spinning just a big faster.
-
- 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.
-
- Environment
Flu river
Rivers polluted with Tamiflu could help a resistant flu strain develop in birds.
- Environment
A gassy threat from above
In Earth’s atmosphere, nitrous oxide threatens the ozone layer.
