There is a world somewhere between reality and fiction. Although ignored by many, it is very real and so are those living in it. This forum is about the natural world. Here, wild animals will be heard and respected. The forum offers a glimpse into an unknown world as well as a room with a view on the present and the future. Anyone able to speak on behalf of those living in the emerald forest and the deep blue sea is invited to join.
It is harder to study on the anatomy of the extinct animals than the extant ones.
But I heard that the South American Populator was built for stamina, while their North American cousins are more akin to the modern big cats, the speed over the stamina.