Eighty years ago on January 20, 1942, the infamous Wannsee Conference took place in a large lakeside three-story mansion in suburban Berlin. Fifteen Nazi German leaders attended the meeting that coordinated plans to "orderly execute" ---murder--- millions of Jews during World War II.

The upcoming holiday of Tu BiShvat -- the birthday of the trees - brings back a memory of the American Museum of Natural History in New York. In the museum is an enormous cross-section of a giant sequoia tree. Standing before it is a sublime experience. The cross-section overwhelms you with its sheer size, inspiring questions about the size of the tree it was cut from.