Elon Musk said he's trying to help the "underpopulation crisis."
The comments came a day after Insider reported that Musk had twins in November with one of his top executives.
Musk now has nine known children.
Elon Musk said he is trying his best to head off an "underpopulation crisis."
"A collapsing birth rate is the biggest danger civilization faces by far," he tweeted on Thursday.
The comments came a day after Insider reported that Musk had previously unknown twins in November with Shivon Zilis, a top executive at Neuralink, one of his companies. Musk now has nine known children.
—Elon Musk (@elonmusk) July 7, 2022
Neuralink, which Musk cofounded and serves as a co-CEO of, is developing brain-computer interfaces. Zilis works there as director of operations and special projects. Musk and Zilis did not respond to Insider’s requests for comment.
Musk has expressed concerns about declining birth rates for years. "The world's population is accelerating towards collapse, but few seem to notice or care," he tweeted in 2017. Last year the Tesla CEO called population collapse "potentially the greatest risk to the future of civilization." Experts are divided on the topic.
One consequence of population decline that worries Musk most: not enough people to colonize Mars. Musk, who founded and helms the rocket company SpaceX, aims to land humans on Mars before the end of the decade.
The entrepreneur has highlighted his efforts to curb population decline before. "Contrary to what many think, the richer someone is, the fewer kids they have. I am a rare exception," he tweeted in May. Musk is the world's richest person, with a fortune estimated to exceed $200 billion, according to Bloomberg.
"Mark my words, they are sadly true," Musk said in a subsequent tweet Thursday.
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