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And salties and freshies have slightly different colour vision.
Plant defences repurposed for a carnivorous lifestyle.
Energy expenditure means trade-offs.
Study shows why the breed is most likely to be obese.
There may be much more diversity than previously thought.
Genome of 51 individuals shows population movements driven by climate change.
Calcium and magnesium can jolt a mouse awake: study.
Study forces a rethink of sleep's evolution.
Sugary 'plant bleeding' beefs up security when pests are around.
But don't throw out your bedsheets just yet.
Five stunning shots of your body's hidden defence systems.
Flower-triggering protein may be a prion: study.
Baby titanosaur needed little attention from its parents.
Losing teeth was helpful, not harmful.
Evidence of earliest movement of mammals between South and North America.
It's your brain's fault, but it's only trying to help.
Pathogen-free lab environments leave the animals' immune systems weak.
They grew massive to fend off competitors for megafauna carcasses.
You can thank your immune system for your bad mood.
Links between mind and body are self-evident.
Women could be more prone to injuries during extended shift-work than men.
Fewer species doesn't necessarily spell doom.
Future crops could be more resistant and less toxic.
Everything you need to know about the revolutionary gene-editing tool.
Egg traps that are a fifth the cost of pesticides.
Irritable bowel can be calmed by roundworm infection: study.