27. With no gravity in space all the blood rushes up to the head. Could we explode because of this? (A K2S Question)
From The Space Library
The shift of body fluids to the head in space will not cause your head to explode, but it does make the astronauts uncomfortable. The feeling is similar to having a head cold.
Answer provided by Col. USAF Dr. Richard S. Williams
Question and Answer extracted from the book Kids to Space - by Lonnie Schorer
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