Three years after first proposing the idea, SpaceX CEO Elon Musk again wants to "nuke Mars."
"Nuke Mars," Musk tweeted on Friday. He followed that up with several other tweets, including noting that T-shirts with the slogan would be up soon. He also said that dropping nuclear weapons on the planet's poles would not solve everything, but the controversial plan is "a step in the right direction."
Nuke Mars!— Elon Musk (@elonmusk) August 16, 2019
Not saying it solves everything, mind you, but it’s a step in the right direction— Elon Musk (@elonmusk) August 18, 2019
Musk has posited the contentious idea before. In 2015, Musk told Stephen Colbert in an appearance on his television show that in order to make the planet habitable for colonists, the easiest way to insert greenhouse gases and warm the Red Planet would be to drop nuclear weapons on its poles.
Musk appears to be serious about putting a colony on Mars, an idea he first proposed in 2016. In 2018, he tweeted that a colony on the Red Planet could happen by 2028.