They are called sky islands. Tall mountains surrounded by a “sea” of desert, yet, almost literally, not a drop of water to be found. Across Arizona, New Mexico and northern Mexico, there are about 55 ...

Measuring the temperature on the seafloor: In the newly discovered hydrothermal field, hot liquid and cold gas bubble up from the sediment just a few centimetres apart. Off the coast of Papua New ...

A secret population of polar bears in Greenland has been discovered in a seemingly impossible habitat — one that, for most of the year, lacks the floating platforms of sea ice the beasts use to hunt.

The Lancaster Conservancy has transferred a 175-acre nature preserve to the state. Rock Springs Nature Preserve was transferred to the Pennsylvania Department of Conservation and Natural Resources’ ...