What is music? Many of today's top artists and scholars grapple with the question in this cinematic look at a uniquely human obsession. The Heart is...

Bill Nye is retiring his kid show act in a bid to become more like his late professor, astronomer Carl Sagan. Sagan dreamed of launching a spacecraft...

A radio astronomer receives the first extraterrestrial radio signal ever picked up on Earth. As the world powers scramble to decipher the message and...