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Sloths repeatedly evolved large and small body sizes

Life

Giant ground sloths evolved three different times for the same reason

An analysis of the sloth family tree suggests three different groups of the animals evolved to gigantic sizes in response to cold and dry conditions

News

Life

The first teeth were sensory organs on the skin of ancient fish

News

Humans

What the complete ape genome is revealing about the earliest humans

News

Swallow (Hirundo rustica) in flight chasing a Tsetse fly (Glossina sp.), Kenya, Africa.

Life

Welcome to a great, straightforward guide to the tree of life

Culture

Humans

Humans evolved to survive mild burns at the expense of severe ones

News

Life

Oldest ant fossil ever found shows how ants took over the world

News

Health

The evolution of easier births means slower walking and pelvis issues

News

USA, Alaska, Katmai National Park, Young female Grizzly Bear (Ursus arctos) rests on river bank beneath coastal mountains along Kinak Bay on autumn morning. Photograph by Paul Souders.

Life

What the surprising lives of solitary animals reveal about us

Features

Cannibal spiders have strange trick to stop their siblings eating them

Life

Cannibal spiders have strange trick to stop their siblings eating them

News

Unusually tiny hominin deepens mystery of our Paranthropus cousin

Humans

Unusually tiny hominin deepens mystery of our Paranthropus cousin

Paranthropus was an ape-like hominin that survived alongside early humans for more than a million years. A fossilised leg belonging to a strikingly small member of the group raises questions about how it did so

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Life

The anus may have evolved from a hole originally used to release sperm

News

Life

Ancient wasp may have used its rear end to trap flies

News

Humans

A controversial book about human diversity shows how biology unites us

Culture

Life

Bizarre fossil may have been an entirely new type of life

News