Rubber bands do the exact opposite ... transfer the thermal energy from the bands to the air. The whole thing is hand cranked, so this would make a perfect museum or educational demonstration.

Rubber bands are one of the most essential items in the household, used for everything from tying hair to a variety of other ...

Now 21 years old, Bendek is the CEO of a company called Elastic Energy, which takes that rubber tree sap and makes an elastic band into the main fuel source for the battery, which weighs about 200 ...