Videos: Big Contraption blog
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Highlights from the TV show
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How could something as complex as the eye evolve?
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It sounds daft but what's the horsepower of a horse?
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Here's what happens when a jet engine sucks in volcanic ash.
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Jem attempts to beat a Top Gear speed record.
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Do children lie? Dallas shows that the proof is in the eating.
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Just how fast can a toffee-powered rocket go?
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Science speak
- Carl Sagan, astronomer, astrophysicist, cosmologist (1934-1996)
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