"My first child was born on December 27th, 1839, and I at once commenced to make notes on the first dawn of the various expressions which he exhibited."
It will come as no surprise to many readers that this is a quote from the ever observant and curious English naturalist Charles Darwin (1809-82), originator of the theory of evolution by natural selection.
He was convinced that all facial expressions were universal in all people, and even in animals, and that they must have a "gradual and natural origin."