Researchers have discovered argon trapped in air-hydrate crystals in ice cores, which can be used to reconstruct past temperature changes and climate shifts. On the massive sheets of ice that stretch ...

Creating a composite photograph of the images taken by the Color and Stereo Surface Imaging System ( CaSSIS) aboard the Trace ...

For years, scientists have puzzled over how Mars lost the thick atmosphere it once had. That atmosphere was essential for liquid water to exist on the planet’s surface, billions of years ago. Today, ...