Elon Musk's new idea: Nuke Mars

By Todd Leopold, CNN

Updated 1607 GMT (0007 HKT) September 11, 2015

When is a rock more than just a rock? When it's an iguana, of course. Conspiracy theorists have been trawling through photos taken by NASA's Curiosity rover and pointing out mysterious objects that they say are proof of life on Mars.
Photos: Life on Mars? You be the judge
When is a rock more than just a rock? When it's an iguana, of course. Conspiracy theorists have been trawling through photos taken by NASA's Curiosity rover and pointing out mysterious objects that they say are proof of life on Mars.
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The Star Destroyer: UFO buffs claim this pic shows a Star Wars-like spaceship that crash landed on the red planet.
Photos: Life on Mars? You be the judge
The Star Destroyer: UFO buffs claim this pic shows a Star Wars-like spaceship that crash landed on the red planet.
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The Squirrel: Observers spotted a squirrel crouched between two rocks in this Curiosity photo. NASA says rodents would be "further up the food chain" than Martian life, if it existed, ever made it to.
Photos: Life on Mars? You be the judge
The Squirrel: Observers spotted a squirrel crouched between two rocks in this Curiosity photo. NASA says rodents would be "further up the food chain" than Martian life, if it existed, ever made it to.
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The Strange Lady: This ghost-like "woman" seems to peering down at Curiosity from a cliff. NASA says it's probably just an oddly shaped drift of sand.