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This is a science demonstration that is often used as a magic trick, to make a coin suddenly appear. It is a very easy trick. All you have to do is change the speed of light.
Imagine for a moment that you are stranded in the desert, and running short on water. Or imagine that you are in a boat far out at sea, surrounded by salt water, but no fresh water to drink. Is there any way you could use some science to get something to drink? Of course there is!
We are going in search of fats in our foods. This test does not require you to taste the food, but that doesn't mean you can't have a snack along the way.
I took this photo while working on the "Micro-Crystals" video, and thought this might be a challenge. What common chemical is this? Hint: The colors are from polarizing filters. The crystals are normally clear.
