Typically, male birds have more vivid colours than females. As Charles Darwin first explained, the most colourful males are ...

The terror bird. It’s a name that strikes fear, and with good reason. These “super predators” from the Phorusrhacidae were a family of massive carnivorous birds that were among the largest predators ...

I used to obsess over my fitness tracker after every run, wondering why some days my 3-mile loop showed 280 […] The post How ...