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Featured Videos
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Not Right For WatchKnowLearn
Ages: 10 - 18
3580 Views:
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The students get a virtual look into how to do a stem cell transplant or bone marrow transplant, something that Leukemia patients may get to have a chance at a longer and happier life. During this interactive game students will learn what a stem cel...l transplant is and help our scientists perform one!
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April 2, 2012 at 10:12 PM
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Not Right For WatchKnowLearn
Ages: 11 - 18
3493 Views:
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Salman Khan offers examples of basic divisibility tests. (06:33)
July 22, 2012 at 05:29 PM
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Not Right For WatchKnowLearn
Ages: 14 - 18
3922 Views:
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All across the immense reaches of time and space, pace, energy is being exchanged, transferred, released, in a great cosmic pinball game we call our universe. How does energy stitch the cosmos together, and how do we fit within it? We now climb the p...ower scales of the universe, from atoms, nearly frozen to stillness, to Earth's largest explosions. From stars, colliding, exploding, to distant realms so strange and violent they challenge our imaginations. Where will we find the most powerful objects in the universe? (25:07)
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September 23, 2012 at 02:31 PM
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Not Right For WatchKnowLearn
Ages: 9 - 18
2677 Views:
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Wildebeest in the millions make their annual migration through East Africa. (02:42)
July 26, 2012 at 02:12 PM
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Not Right For WatchKnowLearn
Ages: 10 - 18
9714 Views:
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Copernicus was ridiculed by his peers and Galileo was found guilty of heresy by the Catholic church for their views that the Sun (not the Earth) was the center of the Solar System. The video has a fascinating account of Galileo's observations of Venu...s. (05:06)
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July 10, 2009 at 06:08 PM
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Not Right For WatchKnowLearn
Ages: 10 - 18
3923 Views:
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This video from Wild Nevada introduces the peregrine falcon, the so-called king of birds and bird of kings. Described by ornithologist Elise Schmitt as one of the fastest animals on Earth and a fierce hunter of other flying birds, the peregrine falco...n has been designated an endangered species because of dwindling numbers related to environmental exposure to the pesticide DDT, which drastically reduces the survival rate of its young. The video also describes the peregrine's hunting habits and preferred habitat, as well as the success of captive breeding programs, which have restored healthier populations to Nevada and elsewhere. Closed captioning included. (03:08)
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September 26, 2010 at 08:46 PM
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