How the Universe Works

Astronomers dig in to speculate what a mysterious ninth planet that's lurking in the outer reaches of the solar system might be like.

We're studying recent black hole collisions to find out how supermassive black holes are created.

Scientists reveal Pluto's life-sustaining secret below its mountainous surface.

We're counting down NASA's top six most-wanted stars worthy of any sci-fi film.

We're sending a space ship full of crash test dummies to explore the deadliest hot spots in the cosmos.

Technological innovations are revealing that despite having to endure violence and other catastrophic events, Martian life continues to bounce back.

Scientists know that dark matter has been vital to our universe since its birth, but many mysteries remain. New discoveries reveal that it could create black holes, cause mass extinctions and maybe even shape life on Earth itself.

Astronomers research strange new planets that vary differently from the Earth we know.