Scientists are set to explore the world’s highest fresh water lake 4 miles up in the Licancabur volcano near Antofogasta in Chile.

Their aim is to find out how the organisms that live there can survive in such a hostile environment. They will do this by taking samples and diving to the bottom of the lake.

Although the lake at Licancabur volcano is covered with almost two feet of ice during much of the year, the expedition will take place in the southern hemisphere's spring, when the lake is not completely frozen.

The information they hope to gather will help astrobiologists devise strategies and technologies to search for life on planets like Mars during future missions.