he was a little taller and has been in a state of microgravity. this is normal. he has gone back to normal as well as decreased body index, get back. changed, dietary and nutritional changes. and it has not gone back to normal, his gene expression has remained altered. you have your dna, and from your dna, you have certain color hair, eye color and look a certain way. those jeans change throughout life. the inside of an apple turns brown. >> our body does the same thing, physical and mental stress can change our body. that is why we have chronic disease, heart disease, cancer, type 2 diabetes. in space, you have microgravity,