I get that you're joking, but I wonder if it could just be that we happen to be passing through some sort of interstellar debris cloud.

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mr_toad 2 days ago | parent | next [-]

Actually we’re in a surprisingly sparse area of the galaxy, a giant hole in the galaxy created by one (or more) supernova.

https://en.wikipedia.org/wiki/Local_Bubble

	▲	stevedonovan 2 days ago \| parent [-]
		So much for the old thermonuclear ramjet idea....

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kirykl 2 days ago | parent | prev | next [-]

Maybe. The solar system was in this galactic position about 250 million years ago (one galactic year) and there was a major extinction event around that time

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tigerlily 3 days ago | parent | prev [-]

Get ready for the, uh, Latter Day Late Heavy Bombardment!