Mega-tsunamis in Mars's ancient ocean shaped planet's landscape

Giant waves, possibly triggered by two meteorite impacts, may have shaped Mars's coastline and could hint at whether the red planet was once habitable

Mega-tsunamis in an ancient ocean on Mars may have shaped the landscape and left deposits that hint at whether the planet was once habitable, researchers say.

The giant waves, thought to have reached up to 120 metres in height as they raced over the land, could have been triggered by two large meteorites slamming into the surface.