Scientists notice that great apes love teasing and fooling around, which leads them to believe humor is older than humans. Plus, researchers discover some artificial heart patients are able to regrow heart muscle, offering new hope for future treatments. On This Day in History, the tradition of celebrating New Year’s Eve at Times Square began over 100 years ago and a few later, the ball drop begins.

Great Apes Joke Around, Suggesting Humor Is Older Than Humans | Scientific American

Spontaneous playful teasing in four great ape species | Proceedings of the Royal Society B: Biological Sciences

Can the heart heal itself? New study says it can | ScienceDaily

NYE History & Times Square Ball | Times Square NYC

The History of New Year's Eve in Times Square | CityPASS® Blog

A Brief History of Times Square’s New Year’s Eve Celebration

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