Scientists studying our planet have a pretty good idea of what goes on up here at the surface. Understanding what's going on deep underground or in the depths of the Earth's oceans is another matter ...

Certain desert dunes produce a deep, steady sound. This phenomenon occurs when dry sand slides down a dune's steep slope. Millions of grains move together, creating a low-frequency hum. This requires ...

Launched into space in 1977, NASA‘s Voyager 1 is the most distant human-made object from Earth, currently residing 14 billion miles away from the planet. The spacecraft first reached interstellar ...