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Leonardo da Vinci Bridge
Posted 7 years ago by boyt in category: fascinating   Comments (0)

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Primitive Technology: Forge Blower
A forge is a type of hearth used for heating metals.
Posted 8 years ago by boyt in category: fascinating   Comments (0)

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Membrane acts like a reversed filter
Like a regular filter but reversed. Can be used to keep as a surgical membrane.
Posted 6 years ago by boyt in category: fascinating   Comments (0)

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The Yoshimoto Cube
Posted 15 years ago by boyt in category: fascinating   Comments (0)

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How to Make a Mini Crossbow
Posted 10 years ago by DaveHax in category: fascinating   Comments (1)