Today is National Pie Day (the less-cool cousin of March 14's Pi Day) and, to celebrate, we've compiled 10 fun and easy pie-tin crafts from the Popular Science archives.
What do a hipster chandelier, an amateur telescope, and a living-room jet engine have in common? You can make each one with an ordinary pie tin!
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Engineers are racing to build robots that can take the place of rescuers. That story, plus a city that storms can't break and how having fun could lead to breakthrough science.
Also! A leech detective, the solution to America's train-crash problems, the world's fastest baby carriage, and more.


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