Comet Swift-Tuttle could WIPE OUT humanity in 2,400 years

Comet Swift-Tuttle could WIPE OUT humanity in 2,400 years
Comet 109P/Swift-Tuttle completes its orbit around the sun every 133 years, and roughly 2,400 years from now, this will bring it ‘perilously close’ to our planet, astrophysicist Ethan Siegel warns.

Comet Swift-Tuttle could WIPE OUT humanity in 2,400 years

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