University of Cologne scientist led research proposing new theory . It suggests temperatures at the equator were -40°C 2.4 billion years ago . The reasons why the whole planet was frozen are not understood . But it could have implications for finding life on frozen moons like Earth .
University of Cologne scientist led research proposing new theory . It suggests temperatures at the equator were -40°C 2.4 billion years ago . The reasons why the whole planet was frozen are not understood . But it could have implications for finding life on frozen moons like Europa .