NASA's Twins Study confirms spaceflight can: damage DNA; change how thousands of genes are expressed; increase the length of telomeres (the caps that protect chromosomes); increase inflammation; and thicken carotid artery walls. However, over 90% of the changes returned to normal post-flight.

NASA's Twins Study confirms spaceflight can: damage DNA; change how thousands of genes are expressed; increase the length of telomeres (the caps that protect chromosomes); increase inflammation; and thicken carotid artery walls. However, over 90% of the changes returned to normal post-flight.: http://bit.ly/2UYFHYw Read more... http://bit.ly/2VILJt6