I love this book so far. It talks about how all of the cavemen had to "Guess about everything". For instance it said they had to guess about how old they were, the length of anything and the weight of anything. Then they started to create measuring systems, and used the stars and the sun to see the time, and even created scales to weigh objects. Overall I'm really enjoying this book, especially because I love math!
— Feb 03, 2014 05:12PM
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