New Evidence Suggests Icebergs in Frigid Oceans on Ancient Mars

Ancient Mars once had surprisingly frigid primeval oceans complete with their own icebergs, new evidence suggests.
There are currently two leading ideas for what the climate of ancient Mars might have been like.
One is that it was cold and dry, contending that valley networks and other geological features suggestive of liquid water in Mars’ past were essentially results of bursts of heat confined in space and time, suggesting that Mars could not have sustained oceans. The other is that Mars was once warm and wet, implying that it could once have supported lakes, seas and rainfall for long periods.