Among humans and many other species, parents have a super sense when it comes to a crying baby. Something in that wordless call communicates distress so clearly that it sparks an instinctive response. And the cries of human, chimp and bonobo babies are so compelling that even other species recognize and react to them, including Nile crocodiles. However, to a croc, a human baby’s screams may sound less like a cry for help—and more like a dinner bell.
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