Ditching Facebook could reduce stress but also make you less happy
7 January 2019
People who took a five-day break from Facebook had a decreased level in the stress hormone cortisol, but also reported a lower life satisfaction
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Premium
Fetal sharks may look for food by swimming around inside their mothers
3 January 2019
Tawny nurse shark fetuses have been discovered swimming from one uterus to another inside their mothers, likely looking for undeveloped eggs to eat
Green light implant relieves urinary incontinence in rats
2 January 2019
A device that modulates nerve signals by shining green light on them has been found to restore bladder control in rats that urinate too often
Black-haired monkeys in Costa Rica are suddenly turning blonde
2 January 2019
The howler monkeys of Costa Rica normally have black coats, but over the last 20 years some have turned yellow – a change too fast to be explained by evolution
