Underwater walkie-talkies could work long-distance with radio trick
It can be difficult for divers to talk underwater, so they often use sign languageLITTLE…
Tag: trick
Mysterious rotation trick makes magnets float in the air
There is a simple way to levitate magnets – and physicists are beginning to understand…
The easy trick to evenly cut a pizza into 5, 7 or any number of slices
Malkovstock/iStockphoto/Getty Images FAIRNESS is important – in life, and in pizza. If you want to…