It is a term that a lot of us are probably familiar with – nature versus nurture. But now, for the first time, research has been conducted into the conundrum on a cosmic scale. And it is all thanks to a pair of identical twins – both of whom are astronauts – and a 2016 mission to the International Space Station that lasted almost a year. The results could well be the next step in a planned NASA voyage to Mars.
New Jersey-born Scott and Mark Kelly are unlike any other astronauts for one very important reason – the 54-year-olds are identical twins. They are the only such pairing – indeed, the only brothers – who have ever been launched into space. And it is thanks to their familial connection that they have played a huge part in the current drive by the National Aeronautics and Space Administration – NASA – to find out more about the effects of space travel on the human body.