It's our most requested episode ever AND our most-answered riddle ever!  You guessed it - it's the platypus.  This is one seriously cool animals you guys. I mean, how many venomous, egg-laying mammals do you know? Not many, right?  We dive into what makes platypuses so usual, discuss their super strange chromosomes, and talk about a recent discovery of a stegosaurs-platypus. Yup, no typos. Special thanks to Samson and Dorothy, long-time listeners with an impressive amount of platypus knowledge! Also special thanks to E.J. and all the other listeners who requested this episode, and who answered the riddle.  If you're interested in the sex chromosomes of platypuses (and let's be honest, who isn't), check out this video. The visuals are really helpful. https://www.youtube.com/watch?v=_nyAl7TipkI Thanks as always to Andrew of the awesome podcast Ear Snacks for the theme music.  And please keep in touch - coolfactsaboutanimals@gmail.com or Tweet us at @coolanimalspod And support us on Patreon at https://www.patreon.com/coolfactsaboutanimals