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3:58
When you were an embryo, a parade of molecules sculpted the cells that became your face.
2:32
Japanese master craftsmen turned a pile of crude iron into the deadly Samurai sword.
2:42
This ingenious experiment proves that gravity changes the color of light all around us.
3:49
These three things have been said to go faster than light, but do they?
3:15
A team drills into the crater made by the asteroid that may have wiped out the dinosaurs.
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After 50 years, Craig Packer & his team have records of the nearly 5,000 Serengeti lions.
