HDMovies

Are we alone in the Universe? What makes Earth so different? Part of the answer is our volcanoes. without them we would not be here either. Today we...

Destructive weather forces are symptoms of Earth's creative energy. In our quest to discover if we are alone in the universe, we shouldn't just look...

We once thought that the only planets were in our solar system. We have found many other planets but they are nothing like we expected, from...

The Universe is a magnetic minefield. Spinning star systems crackle and explode, magnetic monsters rip worlds apart, star-quakes shoot beams of...

We owe our existence to the stability of earth's orbit. But we are the freaks: everywhere else we look we find orbits are chaotic, unstable, and...

As time machines from the early universe, comets could hold the key to unlock the secrets of the cosmos, and may even be the origin of life itself....

Asteroids wiped out the dinosaurs and may be back for us but they also built the Earth and may have brought life to its barren surface. Asteroids...

The Earth was formed by a series of cataclysms without which we would not exist. Could the same events have created other earth-like planets...

Host Emily Calandrelli, Harvard scholar and former Nasa employee, takes viewers on incredible journeys through space. She visits various NASA...

Carl Sagan covers a wide range of scientific subjects, including the origin of life and a perspective of our place in the universe.