AI solves the Rubik’s cube | Nature Briefing

Hello Nature readers,

Today we learn that protests have shut down 13 observatories on Mauna Kea, discover that a deep-learning algorithm has taught itself to solve a Rubik’s cube and hear how researchers recover when a disaster destroys everything.

(Philippe Psaila/Science Photo Library)

Researchers rethink mouse swim tests

Animal-welfare campaigners and scientists have growing concerns about a popular test in which mice or rats are dropped into a tank of water while researchers watch to see how long the animal tries to stay afloat. In theory, a depressed rodent will give up more quickly than a happy one. But mental-health researchers have become increasingly sceptical in recent years about whether the forced-swim test is a good model for depression in people.

Nature | Read this article at nature.com/latest-news

Mauna Kea protest shuts down observatories

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