Climate & Weather

Why do leaves change color in autumn?

Earth's atmosphere is mysteriously losing oxygen

Why is the sky so blue in autumn?

News flash: 200-mile lightning sets world record

Why does my grass look greener after it rains?

Scientists discover grove of 1,000-year-old trees in Greece

13 ominous photos and videos of roll clouds

How volcanoes have shaped Iceland

How often are animals struck by lightning?

Extinct smallpox virus could be resurrected by global warming

Watch dramatic rescue of woman, dog in Baton Rouge

Siberia experiences deadly anthrax outbreak due to melting permafrost