Crater Clues: Finding Water on Mars and Earth

December 3, 2012

[Berkeley Science Review] Standing on the dusty rim of Meteor Crater (pictured) in Northern Arizona, Lab earth scientist William Dietrich thought, “It looks just like Mars!” The crater (called the Barringer Crater by scientists but officially named after the nearest post office in Meteor, AZ) was created approximately 50,000 years ago, when a 45-meter-wide asteroid impacted earth. The crater is nearly one mile wide, but Dietrich was particularly impressed by the erosion gullies that had formed at the crater’s rim. These gullies, he thought, bear some striking similarities to those observed on Martian craters. More>

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