NASA study show the stress of space travel

Its taken 29 years, but the 1988 buddy movie Twins no longer depicts the most important research on genetic differences in twin brothers. NASA has taken that crown, releasing some startling early results from their year-long analysis of identical twins Scott and Mark Kelly – one of whom spent a year in space, while the other remained on Earth.

Source: Early results of NASA study show the stress of space travel | Alphr