'Space headaches' a problem for astronauts: report

Astronauts who have no history of bad headaches can be prone to disabling attacks while in space, a phenomenon that suggests "space headaches" deserve a medical category all of their own, neurologists said on Tuesday.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