What’s even more odd about Ptychodus is that despite their success and diversity during the late Cretaceous period, they went extinct on their own. No mass extinction required… and nobody can figure out why. But for a time, everyone agrees that the Western Interior Seaway was terrorized by a dominant clade of large, fast, enigmatic shell crushing sharks, unlike anything the world had seen before OR since. What a privilege to reveal such a unique organism. Props to @Graham Payton for these back t

If you tried this what would you put inside 你會在裡面放什麼 #foodtiktok