Tom Magliery built [37 Heaven](http://thirty-seven.org/index.html) in 1994 to collect interesting facts and appearances of the number 37. He apparently has a massive collection of items with 37 on them, but hasn’t updated his site since he launched it. (Maybe for the 37th anniversary??) Some of my favorite facts: - There are 37 holes in the mouthpiece of a telephone. (Not relevant anymore, but still neat.) - There are 37 bars in the digits of a digital watch. - "Normal" human body temperature is 37 degrees Celsius. - There are 37 genes in the mitochondrial genome. - If you’re trying to choose the best option for something, 37 is involved in a lot of the [math](http://thirty-seven.org/index.html). (Described in more detail in [[50 - 59 INPUT/46. VIDEOS/Veritasium. 'Why is this number everywhere'. YouTube, 2024-03-28.]] where Magliery was interviewed.)