Note from Katie: As I question nature's wisdom with regards to the third trimester of pregnancy, I thought I'd offer you one of my favorite past episodes about how doofy and convoluted evolution can get. Today on the show: They're not dinosaurs, they're from BEFORE the dinosaurs, and they're very, very, very strange. Giant apex predator shrimp thingies, centipedes you could ride on, the tully monster, evolution's most amazing mistakes! I'm joined by paleontologist and science educator Dane Pavitt. Check him out at www.theaveragescientist.co.uk  and  www.youtube.com/danepavitt  Footnotes: Last week's mystery animal sound sourceSee omnystudio.com/listener for privacy information.