杏吧原创

Atmosphere

pondweed with oxygen bubbles

Environment

Why is Earth so rich in oxygen? The answer is simpler than we thought

It took billions of years for Earth鈥檚 air to grow rich in oxygen, but it may have been destined to do so once photosynthetic bacteria began pumping out the gas

News
Northern lights

Space

See the northern lights or aurora borealis: Follow this easy guide

Regulars
meteor shower

Space

The Leonid meteor shower peaks this week: Here’s how to see it

Regulars
Amazon

Environment

Earth’s most important rivers are in the sky 鈥� and they’re drying up

Features

Earth

Inside the powerful fire clouds that pack a volcanic punch

Regulars
Northern lights

Earth

The Northern Lights make a mysterious noise and now we might know why

Features
logs

Environment

Deforestation in the Amazon could raise local temperatures by 1.5C

News
Pluto

Space

It will be ‘snowing’ nitrogen on Pluto for the next century

News
message board

Health

The death of 9-year-old girl may be a tipping point for air pollution

News

Earth

Mystery ozone-destroying gases linked to badly recycled fridges

Last week we learned a chemical that harms the ozone layer is being emitted in Asia 鈥� and now it seems sloppy recycling might be partly to blame

News

Earth

Someone is wrecking the ozone layer again. They must be stopped

News

Earth

We messed up our figures on how much carbon dioxide is too much

News

Earth

China is building a huge weather-control machine 鈥� will it work?

News

Earth

Oxygen may have helped complex life arise a billion years early

News