Could you handle living on Mars?
Nasa is finding out how people cope with the demands of long space missions at its Human Exploration Research Analog (HERA).
For 45 days a crew of four people live in a habitat which simulates a mission to Phobos, a moon that orbits the planet Mars.
The crew carry out daily maintenance tasks on board, enjoy views of space from the capsule window and keep in with mission control via a five minute delay, meaning that a response to a communication takes 10 minutes.
BBC Click finds out more.