Canadian film on the theft of Einstein's brain among Hot Doc world premieres

FILE - This June, 1954, file photo shows renowned physicist Albert Einstein in Princeton, N.J. (AP Photo, File) FILE - This June, 1954, file photo shows renowned physicist Albert Einstein in Princeton, N.J. (AP Photo, File)

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How the lack of gravity in space impacts astronauts’ brain

What happens to the brain when you take gravity away? According to a new study looking at astronauts both before and after space travel, that experience causes physical changes that researchers believe requires at least three years between longer missions to recover from.