New research finds space travel can cause brain damage

ANU astrophysicist and cosmologist Brad Tucker discusses a recent scientific study which has found long missions in space are causing damage to astronauts' brains.

"A lot of this has to do with pressure and gravity that when you're in space a change in pressure and particularly the change in gravity . that they're exposed to changes a lot of ways fluid in particular move in the human body," he told Sky News Australia.

"What they noticed is the ventricles so parts of the brain . during their trip into space after they come back kind of like spaces out, that in fact almost expands in a certain way due to (what) they think the lack of gravity the astronauts are exposed to."