Arsinoitherium was a large, extinct mammal resembling a rhinoceros, known for its two massive, forward-curving horns on its snout. It lived in the late Eocene to early Oligocene epochs, primarily in North Africa, inhabiting swampy and forested regions. Arsinoitherium had a robust body and limbs suited for weight-bearing.

Arsinoitherium was primarily native to the regions that are now part of Northern Africa, specifically in what is known today as Egypt. Fossil evidence suggests it lived during the late Eocene to early Oligocene epochs, approximately 36 to 30 million years ago.

The environment where Arsinoitherium lived was likely a tropical or subtropical climate. During the time of its existence, Northern Africa was characterized by lush, forested areas with abundant water sources, unlike its current arid state.

Arsinoitherium occupied an ecological niche similar to that of modern-day large herbivores. It likely inhabited swampy areas and dense forests, feeding on vegetation such as soft plants found in these moist environments. Its large size and robust build suggest it was well-adapted to a life of foraging in these thick, swampy forest areas.