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PBS
Pbs Learning Media: A Nanotube Space Elevator
In this video adapted from NOVA scienceNOW, find out about the discovery of a new building material, the carbon nanotube, whose physical properties could theoretically enable the creation of a 22,000-mile elevator to space. [4:29]
PBS
Pbs Learning Media: Gravity at Earth's Center
In this video segment from NOVA scienceNOW, learn about the effects of gravity as astrophysicist Neil deGrasse Tyson falls through a virtual hole through Earth's center. [1:45]