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Earth

For instant climate change, just add one large comet

Two geologists claim atmospheric CO2 levels more than doubled in a single year 55 million years ago – the speed makes a comet impact the likely culprit

News

Earth

Is Earth's missing xenon hiding in iron's hot embrace?

News

Climate science: a beginner's guide

Climate science: a beginner's guide

News

Acidifying oceans will heat the planet more

Earth

Acidifying oceans will heat the planet more

News

Earth

Leaked IPCC report doesn't let us off the hook

News

Huge methane belch in Arctic could cost $60 trillion

Earth

Huge methane belch in Arctic could cost $60 trillion

News

Gimme swelter: we explain the UK and US heatwaves

Earth

Gimme swelter: we explain the UK and US heatwaves

News

Last Word

Hot youth

Regulars

Physics

For ultra-precise measures, go for nature's constants

Opinion

Musical argon is most accurate thermometer ever

Physics

Musical argon is most accurate thermometer ever

A noisy ball of argon gas takes us maddeningly close to redefining the unit of absolute temperature, the kelvin, in terms of a fundamental constant

News

Earth

Brightening the clouds touted as a way to save corals

News

Space

NASA launches new telescope to solve sun heat mystery

News

Life

Jumbo challenge: How elephants keep their cool

Features

Physics

Ultimate chill: The epic race to reach absolute zero

Features