Good To Know: Human's Earliest Known Ancestor Had A Mouth But Lacked Anus

January 31, 2017


Seen here looking eerily like several of my relatives, an artist's rendition of Saccorhytus smiles for the camera. Saccorhytus, which were about one millimeter long, lived some 540-million years ago and are believed to be the earliest known ancestor to humans and a bunch of other species. Interestingly, Saccorhytus had a mouth but no anus, meaning the mouth was used for both consuming food and expelling waste. That's nasty. We sure have come a long way, haven't we? 540-million years ago we didn't have one at all, and now it seems like a lot of people are almost entirely anus. Oh, evolution.

Thanks to Mark B, who's convinced 540-million years from now we won't have mouths or anuses.

Previous Post
Next Post