In this age of electronics we marvel at the wonders of computer systems that run everything from shuttle launches to vast communications networks. Yet the human body, with its thousands of genes that provide a unique code of life for each individual, is equipped with systems far more efficient than the most advanced computers and their programs.
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.