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Why do we have sex?

Definition

Why do we have sex?

The origin of sex, then, is a bit of a mystery. And if its origins are hard to understand, its function is just as baffling. At first sight that seems ludicrous. Surely sex has an obvious function: it generates variation, the raw material for evolution.

alien planet with three suns

Space

Planet in triple-star system may be our best chance to find alien life

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Technology

Working hypothesis: from Raspberry Pi to abolishing time

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Great white shark

Life

The secrets of how sharks survived so many of Earth's mass extinctions

Features

Mars rover

Space

Unique chance to confirm methane spikes – and perhaps life – on Mars

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Weird whale may be a hybrid of a narwhal mother and beluga father

Life

Weird whale may be a hybrid of a narwhal mother and beluga father

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How did life begin?

Question

How did life begin?

Blue Planet II’s Steve Simpson explores the sounds of the ocean

Blue Planet II’s Steve Simpson explores the sounds of the ocean

Video

mangrove forest

Environment

How climate change is hitting crab hunting in the mangroves of Brazil

Regulars

Mussaurus patagonicus

Life

Some baby dinosaurs crawled before learning to walk on two legs

A dinosaur that walked on its two hind legs, may have started out crawling around on all fours whilst its body was still developing

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Life

Sea otters are bouncing back - and into the jaws of great white sharks

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Space

A simple experiment could help find alien life on Europa

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Life

Underwater tests reveal sharks may be smarter than you think

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Life

Huge mega-rafts carried dinosaur-era animals on round-the-world trips

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