Elene Abashidze is 102 years old—vigorous, sharp-minded, and remarkably active. She plays the piano and sings almost ...

Imagine waking up one morning to find that every drop of water on Earth—oceans, lakes, rivers, puddles, even the dew on grass ...

A total collapse of the roughly 80-mile-wide Thwaites Glacier, the widest in the world, would trigger changes that could lead ...