The Kardashev Scale measures a civilization’s energy use. Comparing Earth to alien civilizations shows how far we still have ...

6 billion years old and home to more than 100 billion stars. This reality suggests there is likely a mind-boggling number of ...

Scientists say aliens are not hiding in Area 51. Experts believe life may exist on distant planets with water and the right temperature. Some moons in our Solar System, like Enceladus and Titan, may ...