The key to humans living on Mars or the Moon is being tested more than a kilometre under North Yorkshire in a working salt mine.
Scientists have turned deep tunnels under the countryside into an underground lab to investigate how scientific and medical operations would take place in other-worldly environments.
Researchers at the University of Birmingham have launched the Bio-SPHERE project in one of the deepest mine sites in the UK. It is based in a 3,000-metre tunnel network which enables researchers to recreate the conditions humans would experience in similar caverns on the Moon and Mars.
