Remember that vacation you took when you were with your squad? They looked good, you looked good, the weather was perfect and the selfies on fleek. Everyone has moments they remember fondly and wish they could go back to. And, like everyone else, paleoanthropologists wish they could go back in time, too…Just a couple of million years more!
Sitting on a park bench one day, you notice a Great Dane and Chihuahua happily sniffing and circling each other in mutual greeting. Staring, you notice how different they are and wonder how it is even possible that they are still part of the same species. This difference you see is known as ‘variation’.