This chapter was all about the teeth of animals and how its specific shape can tell a scientist what it eats, what kind of animal it was, and whether or not it was singular set of teeth or it was regularly replaced every time a tooth was overused. He also mentions how the teeth itself has evolved to increase an animal's survival rate. The earliest "teeth" found in a fossil was composed of conodonts in an ancient jaw less fish; and the teeth wasn't for protection, it was for eating their prey. However, animals (particularly fishes) started having hard bones as their skeleton which kickstarted the "fish eat fish world" . Finding the teeth bones are also a difficult task since the teeth are usually about two millimeters long and even a small piece of rock could block the teeth from ever being discovered. What I found amusing was that he talked about having a new "look" on things; like what he couldn't see in the sand before, he could now because he knew what to look for in teeth fossils. So far, the book is very intriguing and I look forward to the next chapter
-jenniferly
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