The Ocean 100 Million Years Ago Was Absolute Nightmare Fuel

100 million years ago, North America didn't exist as you know it. Instead, a vast inland sea — the Western Interior Seaway — split the entire continent in two, stretching from the Arctic to the Gulf of Mexico. And in that warm, shallow water lived some of the most terrifying predators this planet has ever produced. Mosasaurus, a fifteen-metre marine reptile with a double row of teeth. Xiphactinus, a fanged fish so aggressive it sometimes died trying to swallow prey whole. Tylosaurus, Pteranodon, and Archelon — a turtle the size of a car that still couldn't escape attack. This is the real science behind the deadliest ocean in Earth's history — an ecosystem so violent and so abundant that it thrived for 27 million years, then vanished completely, leaving its bones buried beneath the wheat fields of modern Kansas. 🦖 Apex Prehistoric brings prehistoric history to life through cinematic storytelling and stunning visuals, exploring the giants that once ruled our planet. ⏱️ TIMESTAMPS 00:00 – A Sea With No Land 1:10 – A Continent Divided 02:50 – Mosasaurus, the Apex Predator 04:37 – A Sea Full of Monsters 06:25 – Life and Death in the Seaway 08:05 – The Ghost Beneath Kansas 🔔 Subscribe for more prehistoric documentaries every week. #Mosasaurus #PrehistoricOcean #Dinosaurs #Paleontology #SeaMonsters #Cretaceous #Documentary #ApexPrehistoric