425 million years ago, a less-handsome version of the Fab Four roamed the earth as prehistoric ocean dwellers. Avalanchurus lennoni (John Lennon) and Avalanchurus starri (Ringo Starr) belonged to the same genus as their Simon & Garfunkel-named friends, while Struszia harrisoni (George Harrison) and Struszia mccartneyi (Paul McCartney) came from a different genus. Together, they comprised one of the greatest bands in evolutionary history.
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