Add Yahoo as a preferred source to see more of our stories on Google. Researchers have discovered the oldest known example of a predator-prey “arms race,” based on their study of ancient fossils. This ...

More than half a billion years ago, mystery predators bored into shelled animals' defensive casings. Some of the holey shells ...

A study led by researchers at the American Museum of Natural History presents the oldest known example in the fossil record of an evolutionary arms race. These 517-million-year-old predator-prey ...

In a quiet part of what is now South Australia, more than half a billion years ago, life was locked in battle. The ocean floor teemed with small shelled creatures trying to stay alive as newly evolved ...

Examples of Lapworthella fasciculata shells (under scanning electron microscope) from the Mernmerna Formation, Flinders Ranges, South Australia, showing holes made by a perforating predator. Scale ...