2 thoughts on “My New Book on Science / Math Education”
In reference to the question on the front cover of your book, my uncle told me when I was 5 that a fart was the sharpest thing in the world because it could go through cloth without cutting a thread.
Reason and Reflection 
In reference to the question on the front cover of your book, my uncle told me when I was 5 that a fart was the sharpest thing in the world because it could go through cloth without cutting a thread.
That seems a reasonable explanation for a five-year old nephew as opposed to getting into the science of gas dynamics!