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A wolf looking for prey on Pleasant Island, Alaska

Life

Wolves are eating sea otters after depleting an Alaskan island’s deer

Since arriving on Pleasant Island, Alaska, in 2013, a pack of wolves has almost wiped out the island’s deer and now subsists mostly on sea otters

A brown ghost knifefish

Life

Ghost knifefish make electric ‘chirps’ to spot where other fish are

Fossil dinosaur egg

Life

Treasure trove of fossil eggs hints titanosaurs nested in colonies

Two people, little girl playing with toy blocks, her mother is sitting next to her at home.

Mind

Children aged 5 are better at switching their attention than chimps

Trilobite

Life

Trilobites used trident-like horns to fight over mates like stags

A bumblebee flies over a field of flowering heather plants.

Environment

Protected areas in Britain fail to stop loss of insects and spiders

Fence lizard on sandstone rock at Santa Susana Pass State Historic Park in Chatsworth, California.

Life

Lizards that survived wildfires are more alert to the sound of flames

Finley, one of the sloths at The Sloth Sanctuary in Costa Rica. Credit: Ignacio Moya

Life

Sloths have double the grip strength of humans and other primates

Anole lizard on a pole

Life

Urban lizards have gene mutations that help them adapt to city life

A jewel damselfish

Life

Reef fish are more placid around islands infested with invasive rats

Around rat-infested tropical islands in the Indian Ocean, jewel damselfish change their behaviour because the algae they eat is less nutritious

Life

Male flies produce a chemical that makes females sleep in after mating

Health

Shortage of pollinators could be killing 427,000 people a year

Life

Fish see in the dark thanks to extra layers of rod cells in their eyes

Life

Living in trees may have given great apes vocal skills for consonants