The 550-million-year-old Quaestio simpsonorum is the first fossil to show a definitive left-right asymmetry, an important sign of evolutionary development in the history of animals. In 1947 ...

Cute features in babies and animals are more than just amusing—they trigger powerful evolutionary responses that help our species’ survival. Moo Deng, the baby pygmy hippo that has become ...

CETI hopes that if humans can understand what’s going on inside whales’ minds—and, eventually, the minds of other animals—it might inspire greater conservation strides. The group has good ...

The discovery helps answer how life evolved on Earth. Quaestio simpsonorum is the first animal to show a definitive left-right asymmetry, an important sign of evolutionary development. The team's ...