Chapter 8

This chapter was so easy to get through. Shubin talks about the olfactory system and how it works. It's all so very ancient and started with of course - fish. Some fish started out with a hole, and later on they developed 2 holes which in turn, see today in our human bodies. It was cool to read how we are able to smell the things we smell and differentiate them into certain distinct categories or like Shubin said, "bellpeppers." It all works because of DNA and which parts of the DNA is active in different cells in the body. All cells have the same DNA but they have different roles because of the distinct parts that are active. That's so amazing!