Blood Falls in Antarctica flows unpredictably with iron-rich, salty water. Microbes inside survive without sunlight.

The Icy Wilderness Under Threat The Arctic and Antarctic are two of the most unique and fragile ecosystems on our planet.

The skull, from an ancient relative of ducks and geese known as Vegavis iaai, suggests that the key characteristics of modern birds were already in place 69 million years ago. Birds evolved from ...