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How bear dogs and sabre tooth cats lived side-by-side over 9 million years ago

Back during the late Miocene period, about 9 million years ago, two large and ferocious predators shared the same ecological niche. The two species, the leopard-sized sabre-toothed cat (Promegantereon ogygia) and the much larger, lion-sized bear dog (Machairodus aphanistus), somehow managed to avoid each other and… »11/07/12 2:40pm11/07/12 2:40pm