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Space

Comets may bring ingredients for life most easily to clustered planets

Comets may be a key source for the building blocks of life, but the only planetary systems where those ingredients could survive impact may be ones with large stars or lots of neighbouring worlds

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Life

Sea cucumbers surprise scientists with spectacular light show

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Orca and fishing boats in the Straits of Gibraltar, Europe

Life

Orcas sink another sailboat as a bewildering wave of attacks continues

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Adult patiria starfish

Life

Starfish don't have a body - they're just a big squished head

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Environment

Ash from wildfires may fuel the growth of plankton in the ocean

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An illustration of the early surface of Earth with a volcano erupting in the background.

Life

How we will discover the mysterious origins of life once and for all

Features

Life

Most mammals go through the menopause - if they live long enough

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Planet Earth III book - page 11 The sharks, though, are in for a surprise because the adult seals mob them instead of fleeing (opposite bottom).

Life

See a mob of seals save their pups from a shark in Planet Earth III

Regulars

A volunteer from the North Atlantic Salmon Fund with one of the escapee salmon

Life

On the hunt for thousands of salmon that escaped Icelandic fish farm

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A male lion and a cub

Life

Do animals know that sex leads to babies?

The time delay between sex and offspring makes identifying the cause and effect a little complicated. Humans have language to explain how reproduction works, but for other animals it may be far less clear

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Environment

Warm seas blamed for the disappearance of 10 billion snow crabs

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Life

Ocean life surged 500 million years ago due to cooler sea temperatures

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Earth

Nearly all mammals will go extinct in 250 million years as Earth warms

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Life

Jellyfish can learn from experience even though they lack a brain

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