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Space X founder Elon Musk has relaunched his proposal that a bombing of Mars by nuclear missiles could contribute to its terraforming by heating the surface of the icy red planet today.
On his Twitter account, Musk released on Aug. 15 a brief message titled "Nuke Mars", followed by another tweet containing the image of some shirts wearing this slogan. He even put this motto as a profile picture.
Four years ago, Musk participated in The end of the show with Stephen Colbert and discussed a strategy to make the red planet more livable: nuclear bombs explode on their poles. The explosions would vaporize much of the ice on Mars, releasing enough water vapor and carbon dioxide, two powerful greenhouse gases, to heat the planet considerably, according to the idea.
However, this idea runs up against the skepticism of many scientists who are questioning not only about the technological ability of the human being to cope with such an enterprise with the technology available, but also about the ethical dimension of it. to intervene on a planet of this level.
Reservations were also expressed as to the effectiveness of the initiative. A 2018 study published in the prestigious magazine Nature Astronomy concluded that Mars does not contain enough CO2 today to allow significant warming, even if everything was released into the atmosphere.
"As a result, we conclude that terraforming Mars is not possible with current technologies," wrote the researchers, quoted by Space.com.
But the nuclear concept could be worse than ineffective, some scientists said. In other words, it could be counterproductive, giving way to a "phenomenon called nuclear winter (similar to the impact of an asteroid that killed the dinosaurs"), in which so much dust is generated and particles that literally block a significant part of the sunlight. "We are cooling the planet," Michael Mann, a climate scientist at Penn State University in the United States, said in an e-mail in 2015.
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