I've worked out the twist at the end of this seasons Big Brother.

The European Space Agency (ESA) has advertised for six "Astronauts" to take part in an Earth based 520 day experiment.

The mission will simulate a Trip to Mars (right).

ESA mission commander Dr. Divina McCall said "You just wait they'll get down to the last 6 contestants. Big Brother will ask them to get into a confided space and then the fun begins."

"They think they've got it tough now just wait till they've been drinking there own recycled piss for 17 months!"

ooo I wonder if anyone have ever had sex during an ESA experiment before.