What is the biggest frozen river in the world?
What is the biggest frozen river in the world? Flowing through frigid eastern Siberia, the Kolyma River is the largest river in the world that is completely underlain by frozen, icy soil called permafrost.
Is there a hidden world under the ice in Antarctica?
Scientists revealed Tuesday that they had discovered a vast, hidden landscape of hills and valleys carved by ancient rivers that has been frozen in time under the Antarctic ice for millions of years.