If optimists see the world through rose-colored lenses, some birds see it through ultraviolet ones. Avians have evolved ultraviolet vision quite a few times in history, a new study finds. Birds depend ...

The reindeer is called caribou in North America but retains the name reindeer across Europe and Asia. However, when caribou are domesticated in North America, they are referred to as reindeer. What a ...

Imagine stepping into a world where hidden colours and patterns come to life—a realm of vibrant UV signals and secret messages invisible to human eyes. While human vision is limited to the visible ...

Daniel Hanley received funding from the National Geographic Society. Vera Vasas does not work for, consult, own shares in or receive funding from any company or organization that would benefit from ...