Follow the Apollo 17 crew on NASA's last manned moon landing, December 1972.

This video was made to spread awareness about Global Warming, If it means something to you, pass it on.

Listen as Stephen Hawking, aided by 3-D animation, explains the concept of space-time and how black holes are formed.

This 'Ask an Astronomer' episode explains how orbits work.

Freefalling on a NASA astronaut trainer plane. ZeroG is a physics lesson about the difference between weight, mass, and momentum. Zero weight, but it still hurts when bumping around. Not to much though. Point being that a 170 pound person may weigh zero pounds in zero gravity, but they still hit just as hard.

Hydraulophones are musical instruments that use water to produce acoustic sound, in which the fingers of the musician are in physical contact with the water.

A teacher created explanation covering constants, isolate, and cancel

Kilauea is the youngest and southeastern most volcano on the Big Island of Hawaii.The Hawaiian name "Kilauea" means "spewing" or "much spreading," apparently in reference to the lava flows that it erupts. Eruptions have been Continuous since January 3, 1983. It is estimated that the first eruption of Kilauea has between 300,000 and 600,000 years ago

Karajan Conducting Beethoven's 5th Symphony. Part 1 (Movements 1 and 2) Very old and rare film, no longer in print, recorded in 1966.

Karajan Conducting Beethoven's 5th Symphony. Part 2 (Movements 3 and 4) Very old and rare film, no longer in print, recorded in 1966.