Up Next
Back to Show
Beyond A Year in Space
The Twin Study
While Scott Kelly spent a year on the International Space Station, his twin brother Mark spent a year on earth. By analyzing the differences between the two men, NASA researchers hope to gain insight into the effects of spaceflight on the human body.
Support Provided By
Unlock with PBS Passport
54:10
Beyond A Year in Space follows Scott Kelly's return to Earth and NASA's Twin Study.
Unlock with PBS Passport
55:37
A Year in Space gives viewers a window into astronaut Scott Kelly’s unprecedented mission.