2021 marks 60 years since NASA's Project Mercury got underway. A series of single-person spaceflights - the first of their kind for the agency - it aimed to prove whether the most basic human functions were possible in space. Could a human eat and drink in zero gravity? Could they sleep? Could they even survive?
Alan Shepard's road to the Moon was not a straightforward one, so you can't blame him for wanting to have a little fun on the lunar surface. He joked in later life that he was probably better known as 'the astronaut who played golf on the Moon' than he was as the first American in space.
Nicknamed 'the Brain', Ed Mitchell was the second ever astronaut to have a PhD. On his way to and from the Moon in 1971, he took part in a psychic experiment designed to see if it was possible to transmit and receive thoughts across tens of thousands of miles.