Researchers say the aim is to gain insights into understanding and treating age-related diseases.

Nasa's Matthew Dominick demonstrates how astronauts eat ketchup aboard the International Space Station.

Children in Essex ask questions including whether she watches TV in space and what she eats there.

This is the reality for American astronauts Sunita Williams and Barry Wilmore who will be voting from space.

A capsule sent to bring back two astronauts stranded on the International Space Station has docked.

The craft will return Butch Wilmore and Suni Williams - stranded since June - to Earth.

A capsule heads to the International Space Station, where two crew are spending months longer than planned.

Prolonged periods in orbit can alter an astronaut's body in some surprising ways, changing their muscles, brains and even their gut bacteria.