New Delhi, June 27 -- MuTech billionaire Elon Musk has raised concerns about what he considers humanity's most serious existential threat, 'falling birth rates'. In a post on X, the Tesla and SpaceX CEO reacted to a user referencing a Fortune report, which claimed that women need to have an average of 2.7 children to sustain population levels.

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Nawfal shared statistics, referencing Fortune, and pointed out that the widely accepted replacement rate of 2.1 children per woman is now considered outdated. He wrote, "Scientists now say 2.1 kids per woman won't cut it - 2.7 is the real number needed to avoid long-term extinction. Right now, the U.S. is at 1.66, and most rich countri...