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You know, as a horse woman, I had never heard of the Hagerman horse.

A fossil skeleton of the extinct Hagerman Horse (considered the grandfather of all horses), a Pliocene species considered an early ancestor of modern horses and zebras. With the first bone discovered in 1928 by a farmer, The fossil beds in Hagerman, Idaho, are one of North America's richest fossil sites, containing over 220 species of Pliocene-era animals.

INTERESTING I thought: Evolutionary Relationship: Both diverged from a common ancestor roughly 4-5 million years ago. However, zebras are part of a closer evolutionary branch with wild asses, while the horse lineage diverged separately.
Genetic Compatibility: Despite being distinct species, they are close enough to interbreed and produce hybrid offspring known as "Zorses" (typically a zebra stallion and a horse mare), though these offspring are usually sterile.
The fossil beds in Hagerman, Idaho, are one of North America's richest fossil sites, containing over 220 species of Pliocene-era animals.
The first bone was discovered by local rancher Elmer Cook in 1928, leading to significant excavations by the Smithsonian.
The Hagerman Horse had a single hoof and is often referred to as the "grandfather of all horses".
The site is now protected as the Hagerman Fossil Beds National Monument.
Aug 08 2025
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