Explore the unexpected ancient beginnings of mammals, a saga that unfolded long before the age of dinosaurs. By examining Earth's chaotic history, we discover how early ancestors known as therapsids—reptile-like beings on the path to developing mammalian features—managed to endure numerous global disasters. Their incredible adaptations, such as burrowing and becoming warm-blooded, allowed them to create a lasting legacy. With the help of intriguing fossil evidence and advanced scientific insights, we learn how a small, tenacious group of animals survived extinction events, outlasted colossal creatures, and eventually led to the rich variety of mammals we see today, including ourselves.
Show
The Delivery Man
Episode
S53E04
Air Date
Feb 11, 2026