Four Buried Lakes on Mars

Researchers have confirmed the presence of a lake discovered two years ago and found three more lakes.

Radar data from the European Space Agency Mars Express was analyzed to reveal the lakes. The Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) sent radio waves that bounce off layers of material in the planet’s surface and subsurface. Areas of high reflectivity indicate bodies of liquid water trapped under more than one kilometer of Martian ice.

The lakes are spread over about 75,000 square kilometers — an area roughly one-fifth the size of Germany. The largest, central lake measures 30 kilometers across and is surrounded by 3 smaller lakes. Each of the smaller lakes is a few kilometers wide.

Earth lakes with salt content about 5 times that of sea-water can support life. There is no life in earth water when salt concentration approaches 20 times that of sea-water.

Other scientists are not convinced that the highly reflective radar readings are liquid lakes. More observations will be needed to get more agreement.

SOURCES- Nature Astronomy
Written By Brian Wang,