04:07
God, Design, and Cosmology
Philosopher Daniel Dennett looks at arguments for the existence of God which are based on the need to explain how the replicating entities required for natural selected came to be.
52:09
Who's Afraid of a Big Black Hole?
Black holes are by definition invisible, and there is no scientific theory that can adequately explain them. Nevertheless, researchers are determined to unravel the mysteries of black holes in the hope of answering some of the universe’s most pres...
55:24
The noble gases
The noble gases, like the noble metals, are characterized by low reactivity. Segments in this program include Exploring the Noble Gases (properties of the noble gases); Helium: Rocket Fuel (helium's part in powering the space shuttle); Neon: Fabulou...