No animal has played so central a role in human civilization than Equus ferus caballus—the domesticated horse. A new study from an international team of scientists discovered that the horse was ...

If we make a taxonomic sandwich between a Equus quagga, the Plains zebra, and Equus ferus caballus, the domestic horse, there’s 7.7 million years of filling. But the donkey-zebra sandwich has ...