It's easy to take for granted that with the flick of a lighter or the turn of a furnace knob, modern humans can conjure flames — cooking food, lighting candles or warming homes. For much of our ...
Amazon S3 on MSN
How to build a fire using just a plunger
The science pros at TKOR show how to build a fire using nothing but a plunger, combining physics, friction, and extreme DIY ingenuity.
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