Making an atomic trampoline
13
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When you make a mathematical knot using elastic material you get jumping loops, and challenging puzzles
8 votes -
Pop-up tents work in a really clever way
7 votes -
Multi-layer reactive foil: no fuel, no oxygen, tons of heat
9 votes -
How NASA reinvented the wheel
2 votes -
The insane engineering of MRI machines
3 votes