The collision with the Indian subcontinent and the Himalayan uplift led to global cooling, desertification, and the disappearance of forest habitats, which resulted in the extinction of these giant ungulates.
The collision with the Indian subcontinent and the Himalayan uplift led to global cooling. The collision with the Indian subcontinent and the Himalayan uplift led to desertification. The collision with the Indian subcontinent and the Himalayan uplift led to the disappearance of forest habitats. Forest habitats resulted in the extinction of these giant ungulates.