Book excerpt: Did you know that 110 silkworms shook their heads 300,000 times each to produce the silk for a Shabbos tie? In the hands of Rabbi Avrohom Katz (Tuvia Cohen), science is not dry. It is interesting often amusing and he uses it as a window on the wisdom of the Creator. The author is a humorist, a scientist, and an excellent writer. He looks at our everyday world and sees the most unlikely things. Chapter after chapter, the author opens our eyes to a fresh view of the universe.