This week marks 50 years since the former USSR put the first man in space.
Behind the success, little is known about the secret experiments and failed launches that dogged the early years of the Soviet space programme.
Neave Barker reports from the Baikonur Cosmodrome, Kazakhstan.
Astrophysicist Neil deGrasse Tyson discusses key moments in his childhood when he was inspired to study the stars. Tyson’s parents were upper-middle class professionals who practiced concerted cultivation (as explained in Unequal Childhoods, Annette Lareau) and nurtured his interests, purchasing a telescope for him at a young age.