Why do cats' eyes glow in the dark? How do our ears stop us from falling? This close-up look at human and animal senses delivers clear and concise answers to the questions children ask.
ThriftBooks sells millions of used books at the lowest everyday prices. We personally assess every book's quality and offer rare, out-of-print treasures. We deliver the joy of reading in recyclable packaging with free standard shipping on US orders over $15. ThriftBooks.com. Read more. Spend less.