The genius of Einstein's theory of relativity was the first evidence that black holes might exist, but scientists still don't know what really happens inside of one. Follow the researchers investigating the dark secrets of this mysterious phenomenon.

NASA's Juno mission reveals secrets about Jupiter, a strange world that is more like a star than a planet; learning what lies beneath the planet's violent storms provides scientists with a new understanding of the solar system.

New research into our solar system's alien volcanoes reveal shocking discoveries; many of these fiery wonders are similar to the volcanoes on Earth, and some might even have created the conditions for extraterrestrial life.