what came first. the chicken or the egg?

Question: what came first. the chicken or the egg?
- Keywords:
  animal,
  evolution,
  philosophy
Asked by 282spaa47 to Julian on 7 Nov 2014.
- Julian Onions answered on 7 Nov 2014:
  
  The egg came first, and it was laid by something that was almost a chicken, but not quite. The egg contained something like its parents but with a few changes that made it a chicken. It was an accident, but one that happened to work out.

Question: what came first. the chicken or the egg?