As the Madre de Dios River flows through Peru toward the Amazon, it eats away at the landscape, slowly turning rock into mud.
The fossil mammal’s body mass, Werdelin notes, would have been comparable to that of a striped hyena or small female leopard. The teeth of Bastetodon show the prehistoric mammal’s ability to ...
More information: Stephanie R. Killingsworth et al, Marine strontium isotopes preserved in fossil shark teeth calibrate Neogene land mammal evolution, Palaeogeography, Palaeoclimatology ...
Remarkably, fossil shark teeth are also incredibly abundant. Sharks ruled the earth’s oceans for 400 million years, and every individual grows and sheds thousands of teeth in their lifetime.
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