It’s not often you hear a prominent CEO talk about nuking Mars, so when SpaceX founder Elon Musk broached the idea on the “Late Show With Stephen Colbert” on Wednesday night, people took notice.
Wait. Elon Musk wants to nuke Mars?
— Worth Godwin (@plaintech) September 10, 2015
She set down her suitcase casually, like Elon Musk explaining his intention to nuke Mars.
— Sandra Allen (@sealln) September 10, 2015
I'm pretty sure Elon Musk just told Colbert he wants to nuke Mars. Clealry Musk isn't Tony Stark. He's now more of a Dr.Doom
— Matt Kalish (@Matt_Kalish) September 10, 2015
No, Musk has not declared interplanetary war on Mars. The idea is to “terraform” it so that future generations of humans could one day live there.
“It’s a fixer-upper of a planet,” Musk told Colbert. “Eventually you could transform Mars into an Earth-like planet.”
(NBC News reached out to SpaceX for comment but the company did not respond.)
Making Mars habitable is a goal of some very smart people, mostly because one day — either due to environmental disaster, an expanding sun, or any other number of disaster scenarios — the Earth will become uninhabitable.
But is nuking Mars really the best way to create a new Earth?
Why it might work
Right now, Mars seems like a dry, dead planet. But its polar ice caps contain about equal parts water and carbon dioxide.
Nuclear weapons could be used to vaporize them, releasing those materials into the atmosphere. Once the atmosphere got thick enough, the greenhouse effect would kick in: energy from the sun, absorbed by the planet and released as infrared radiation, would be trapped.
That would continue heating up the planet, releasing more carbon dioxide, setting off a chain reaction until, ideally, the surface pressure of Mars would increase enough for liquid water to exist — making it much more habitable for oxygen-producing plants.
“You could start turning Mars from a red planet into a green planet,” Michael Shara, curator of the American Museum of Natural History’s astrophysics department, told NBC News.
Nuclear weapons aren’t the only way that humans could melt the planet’s polar caps. Shara offered some alternatives, like finding a way to guide asteroids to Mars’ poles, or covering the poles in a fine, black dust to absorb sunlight and heat them up.
But many ideas involve transporting heavy equipment to Mars, which would be very expensive. Nukes are fairly compact and immensely powerful, offering a lot of bang for the buck.








