Andre Janse van Rensburg

Andre Janse van Rensburg

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An ornithopter is a rubber band powered plane that flaps its wings. Leonardo da Vinci drew pictures of ornithopters in his famous sketchbook...

An ornithopter is a rubber band powered plane that flaps its wings. Leonardo da Vinci drew pictures of ornithopters in his famous sketchbook.

how to make a homemade ultralight camping stove.

Here is an easy DIY aluminum water bottle camping stove you can make in less than an hour, and with supplies you already have around the house.