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2:16
Two centuries of bikes, and we’re still debating the best way to learn to ride one.
2:59
What are intercontinental ballistic missiles (ICBMs), and why are they hard to shoot down?
2:00
Scientists saw and “heard” a dramatic cosmic explosion simultaneously for the first time.
1:45
Cosmic particles reveal a previously hidden void in the Great Pyramid of Khufu in Egypt.
3:57
Even in your mind, energy goes with it—bottle up that energy and it has mass.
1:20
Could a safety technology have prevented a train crash in Washington that killed three?
3:06
A high school experienced several suicides so meditation was used to lower student stress.
2:55
A unique method to fight erosion saved the Montauk Point Lighthouse from disaster.
