In Our Time The Evolution of Horses
Feb 27, 2020
Christine Janis, an expert in mammalian evolution and paleoecology, dives into the fascinating journey of horses. She discusses their evolution from dog-sized ancestors and their eventual domestication in Asia. The conversation highlights the unique anatomy of modern horses and their impressive adaptations for speed and stamina. Janis also explores the intricate relationship between horses and humans, including their significance as food sources and companions. The podcast reveals how environmental changes and human activity have continuously shaped the equine lineage.
AI Snips
Chapters
Transcript
Episode notes
Early Horse Ancestors
- Early horse ancestors were dog-sized, with four fingers on front legs and three toes on back legs.
- They lived in North America over 55 million years ago, browsing on herbs and bushes.
North American Origins
- Early horse evolution occurred primarily in North America, starting roughly 55 million years ago.
- They stayed there for a long period, until about 23 million years ago.
Horse Adaptation
- Early horses adapted to their changing environments in North America.
- As grasslands emerged, they evolved larger bodies, longer legs, and stiffer backs.