海角大神

Elon Musk says there is a fast way and a slow way to warm up Mars to make it habitable for humans.

On Wednesday night on 鈥淭he Late Show,鈥� host Stephen Colbert wanted to know the fast way.

鈥淒rop thermonuclear weapons over the poles,鈥� the eccentric billionaire told him with a nod.

The apparently off-the-cuff remark was not entirely off the mark. Even聽NASA scientists聽believe that it is technologically possible to create considerable global climate changes on Mars to make it more Earth-like.

But it鈥檚 certainly no easy task. And scientists were quick to challenge Mr. Musk鈥檚 proposal.

"Terraforming Mars has been considered and discussed for a long time," Jason Smerdon, associate research professor at Columbia University's Lamont-Doherty Earth Observatory, told US News and World Report. "I nevertheless would be cautious about our ability to terraform and manage another planet when we struggle so mightily with the practical and preventative measures that are vitally needed to maintain our own."

Michael Mann, a professor and director of the Earth System Science Center at Penn State University, told US News that if and when that day comes, the theory goes like this:

Of course, this strategy is far from certain and carries significant risks. The resulting radiation from the bombs might聽make the planet uninhabitable or its native water unusable. The worst-case scenario is that it leads to a nuclear winter by kicking up so much dust and particles that they block out of the sun.

But there are other options, according to Nature World Reports. Greenhouses gases could be released slowly on Mars to help trap heat in the planet鈥檚 atmosphere. Other farfetched ideas include spreading black powder on the polar caps to absorb heat or smashing an asteroid into the poles.聽