Canadian astronaut Chris Hadfield (@Cmdr_Hadfield) treated us to another photograph from space before signing off from Twitter last night, but this one looked more like an ancient fossilized shell than a massive geological formation.
Originally thought to be the site of an asteroid impact, The Eye of the Sahara — more formally known as the Richat Structure — is a 40km wide, eroded rock dome in the west African nation of Mauritania that has been firmly identified as having a terrestrial origin.
Friday, January 18, 2013
Chris Hadfield tweets incredible photo of geographical oddity in the Sahara Desert
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