Mars Didn't Just Have Oceans; It Might've Even Had Giant Tsunamis
The Martian surface shows evidence of huge tsunamis back when Mars was wetter.By Steven Sparkman | May 19, 2016
Mars is dry — so dry that some trickles in a ravine were big news last year.
But Mars was once wet, and new evidence shows it used to have oceans. And those oceans had giant tsunamis.
New maps show signs of at least two huge tsunamis, probably caused by meteors. The waves were up to 400 feet tall.