Brontotheriums were known as the "Thunder Beasts." They roamed the western half of North America during the last ice age. They mainly inhabited such areas as California (Death Valley), Nevada, as well as North and South Dakota. Brontotheriums also lived in Asia.
They lived approximately 32 million years ago. Brontotheriums are commonly mistaken with the modern day rhinoceros. Rhinoceroses have spikes on their heads, Brontotheriums did not. But the two large animals are related to each other.
Scientists think that the monstrous beasts became extinct because their environment changed and no longer provided the food that they ate. They were not "smart" enough to change their diet so they quickly left the earth. They were used to eating plants but when the land dried, those plants often died fast.
"Thunder Beasts" were about 8 feet tall and 15 feet long. Males had larger tusk-like horns than the females.
“Dinosaur Timeline Gallery”
Prehistoric Animal Directory: Expage.com/prebeast “Brontotherium:
The Thunder Beast” at
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