I read recently about astronaut Kelly, who has a twin brother , who is also an astronaut, who spent almost a year in space. And they were study effects on him compared to his twin who remained on Earth.
It makes sense that the longer in space, the more effects, possibly negative effects, will be seen.
Although mark spent less time in space, his cranial cavity became filled with dumanium and he became a rabid anti gun POS. Well except if he and gabby want them. And he’s running for the senate in AZ next cycle. What a disgrace to his Navy uniform and the oath he lied about.