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Medicine for sick koalas turns out to actually kill them

Earth

Medicine for sick koalas turns out to actually kill them

Koalas are often given antibiotics to treat a lethal strain of chlamydia, but the medicines often kill the koalas by wiping out friendly bacteria in their guts

News

Why ancient deer returned to the sea and became whales

Life

Why ancient deer returned to the sea and became whales

News

People walking

Technology

Electrodes fitted behind your ear can make you walk faster

News

Our ancestors mated with the mystery 'Denisovan' people – twice

Humans

Our ancestors mated with the mystery 'Denisovan' people – twice

News

These searing hot chilli peppers are in danger thanks to snakes

Earth

These searing hot chilli peppers are in danger thanks to snakes

News

New shades: The controversial quest to 'fix' colour blindness

Humans

New shades: The controversial quest to 'fix' colour blindness

Features

broccoli farm

Life

Two herbivores gang up and silence a plant's cries for help

News

Dinobird Archaeopteryx only flew in short bursts like a pheasant

Life

Dinobird Archaeopteryx only flew in short bursts like a pheasant

News

Military personnel investigating the poisoning of Sergei Skripal on 11 March in Salisbury

Health

What are Novichok nerve agents and did Russia do it?

News

A male and female brown widow (Latrodectus geometricus)

Life

Daft male spiders prefer females who are more likely to eat them

Female brown widow spiders become less fertile as they age, and more likely to kill and eat their mates – yet males still prefer them over younger females

News

Health

Brain zap can make people re-experience old dreams while awake

News

Life

Leopards that live in cities are protecting people from rabies

News

Life

Mussel pain: The crisis engulfing our freshwater molluscs

Features

Earth

A deadly predator could save the UK’s threatened red squirrels

News