Great summary, great lessons, definitely something worth fully digesting and internalizing.

But to be fair (and pedantic), at least one is untrue.

> • Handy measure: the distance between your fingertips of your outstretched arms at shoulder level is your height.

Ape Index = the difference between your arm span at shoulder level and your height. In other words, a +6" Ape Index means your arm span is 6 inches more than your height.