The herbivore fossil community in Ethiopia and Kenya looks like a perfectly traced line following the Great Rift Valley.
Is that meaningful or just a coincidence?
Noticed that as well. Water, water, everywere there is abundant life.
I think frequency of discovery and where they happened to be located would affect that. There may be just more discoveries along that particular area because it’s a hot spot where fossils happen to get exposed. And here is where the model could be flawed a bit, there may be future discoveries later that completely change this map and frequency of discoveries and locations. They just haven’t been found and put on the map yet. They are elsewhere too, just buried deeper and still undiscovered. Someone will dig a pipeline or build a road and more will be found.
Both, or neither. :^)