10. Our Language Might Be Part-Neanderthal
There is a lively debate between scientists over practically every aspect of Neanderthal behavior and biology. However, most scientists agree that it's Neanderthals were linguistically on par with early humans, especially considering the similarities in cranial development. A studyreleased this year posits that since humans and Neanderthals cohabited and even interbred, the odds are good that we shared a language at some point. That means we might still use linguistic ticks absorbed from our brother species tens of thousands of years ago! Let's blame them for the YOLO craze.