Was Mars' Olympus Mons volcano once an island? earthsky.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from earthsky.org Daily Mail and Mail on Sunday newspapers.
Olympus Mons on Mars, the highest peak in the solar system, may have been a volcanic island encircled by a vast ocean, which might have affected the planet's habitability, according to geological data.
Mars Olympus Mons may have once been a volcanic island surrounded by an ocean nearly 4 miles deep, according to geological evidence found in the extinct volcano.