What came first?

So during class on Wednesday we talked about what came first the chicken or the egg. I did some research and found out that a scientist believes that the chicken came first because they have a particular protein that only a chicken can produce in the womb, without that protein it would be impossible for an egg to be produced without it. I found this article very interesting because it went along with our discussion about causalism. Seeing how we would try and trace back why we do things or our very existence is very complicated, and tricky. I thought that this was my favorite discussion in class yet because we all had a different idea of what came first.