What is truth?

Another outstanding presentation by Andrew Klavan and Bill Whittle.

Einstein refrigerator

The Einstein–Szilard or Einstein refrigerator is an absorption refrigerator which has no moving parts, operates at constant pressure, and requires only a heat source to operate. It was jointly invented in 1926 by Albert Einstein and his former student Leó Szilárd and patented in the US on November 11, 1930.

How neat is that! A refrigerator with no moving parts.

Also.

And here...