5. Which came first? The chicken or the egg?
The answer is the egg. “The egg comes first—when you narrow it down to chickens and the specific eggs from which they emerge. At some point, some almost-chicken creature produced an egg containing a bird whose genetic makeup, due to some small mutation, was fully chicken. Given the incremental nature of genetic changes, locating that precise dividing line is pretty much impossible, but chickens were domesticated, diverging from their wild counterparts, sometime in the range of 7,000 years ago. Neil deGrasse Tyson has endorsed this idea of the not-quite-a-chicken bird laying the egg which would grow up to be a chicken, and Bill Nye agreed.” Time