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Monkeys and apes

Life

Marmosets swap brain cells with their siblings

Most marmosets have non-identical twins or triplets, which exchange blood cells while in the uterus - and now it seems they also swap certain brain cells

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Life

Bottlenose dolphins can sense electric fields with their snouts

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Health

Vagus nerve stimulation may help treat drug addiction

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Apartment air conditioners in a building in Singapore

Technology

Cooling system could replace air con and drastically cut energy use

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Life

Bonobos are friendly with those outside their group – unlike chimps

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Orca and fishing boats in the Straits of Gibraltar, Europe

Life

Orcas sink another sailboat as a bewildering wave of attacks continues

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Life

Chimpanzees use high ground to scope out rival groups

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Space

Mouse embryos have been grown in space for the first time

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Australia, Northern Territory, Hermannsburg, Solar Power Generating Station in Outback

Environment

How countries can go fossil fuel free with wind and solar superpowers

Features

Hundreds of pro-cannabis demonstrators march in New York City

Society

Legalising marijuana hasn't been the quick fix the US hoped for

More than 20 US states have now legalised recreational cannabis, but the devastating effects of prohibition have yet to be overcome, says Zachary Siegel  

Comment

Technology

Tiny generator uses the motion of molecules to produce electricity

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Health

Huge rise in US overdose deaths from fentanyl mixed with stimulants

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Life

Our ultra-mobile arm joints may have evolved for climbing down trees

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Health

Cells from discarded placentas may help to treat heart attacks

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