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atmosphere

Environment

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

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

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pondweed with oxygen bubbles

Space

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

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Northern lights

Space

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

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meteor shower
Amazon

Environment

Earth's most important rivers are in the sky – and they're drying up

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Inside the powerful fire clouds that pack a volcanic punch

Earth

Inside the powerful fire clouds that pack a volcanic punch

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Northern lights

Earth

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

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Environment

Deforestation in the Amazon could raise local temperatures by 1.5C

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Pluto

Space

It will be 'snowing' nitrogen on Pluto for the next century

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Health

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

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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 – and now it seems sloppy recycling might be partly to blame

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Mystery ozone-destroying gases linked to badly recycled fridges

Earth

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

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Earth

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

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Earth

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

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Life

Oxygen may have helped complex life arise a billion years early

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