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Stimulating the brain by taking on leadership roles at work or staying on in education help people stay mentally healthy in later life, according to new research.

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Meerkat

Captive meerkats at risk of stress

Small groups of meerkats – like those often seen in zoos – are at greater risk of chronic stress.

Nightjar

Computer game helps scientists understand animal camouflage

Computer games have helped scientists understand animal camouflage and colour vision. 

Ketamine shows positive results for treating severe depression

A new paper sets out principles for responsibly testing innovative treatments for severe depression, based on treating more than 100 patients with approximately 1,000 infusions of ketamine over six years.