They're purple, hairy, and too tough for most predators to mess with. Angela Nelson is a Pulitzer Prize-winning digital editor and storyteller who covered a variety of general interest stories on ...

Biologists find that sand dollar larvae created clones of themselves ... formed new larvae that were much smaller than the original organism. The original larvae also were substantially reduced ...

Many animals have cunning ways of hiding from predators. But the larva of the sand dollar takes that to an extreme – it avoids being spotted by splitting itself into two identical clones.