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You're being chased by zombies, and understanding tangent vectors may save your life.
3:37
Hot air balloons let people soar into the sky, but they had their share of turbulence.
2:42
Want to make a luxury cruise liner fast? Use two shipyards, then join the pieces together.
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In this iPad app, navigate fields of cosmic objects in your quest to become a black hole.
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That time when NOVA reported on the first sign of the ozone hole's depletion...in 1986
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When you were an embryo, a parade of molecules sculpted the cells that became your face.
