TheBackyardScientist shares a simple way to create a small fire tornado with no moving parts. The trick is to split the glass receptacle in half and place each half around the flame slightly off center. The wind that comes in through the gaps will create the tornado effect.
This footage may be 8 years old, but it doesn’t make it any less impressive. Watch as then high school student Anna Gu demonstrates a bridge she made from layered and glued sheets of paper that was so strong that the hook that held the weights failed before it did. Design here.
While that title might sound like hyperbole, it is the truth. If concrete truly did dry out, it could be reconstituted with water like dry pasta, and couldn’t be used to build things. MinutePhysics explains the not so subtle differences between something being “dry” and “set.”
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