Astronaut: Twelve of the 17 astronauts reported 21 headaches during the test Photo: AP From The Telegraph:
Astronauts who have no history of bad headaches can be prone to disabling attacks while in space, neurologists say.
Contrary to prevailing theories, headaches in space are not caused by motion sickness, they said.
Instead, the problem could lie in an increase in blood flow to the head, causing painful pressure on the brain.
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