What's the Use?

See the world in a completely new way as an esteemed mathematician shows how math powers the world—from technology to health care and beyond.  Almost all of us have sat in a math class, wondering when we'd ever need to know how to find the roots of a polynomial or graph imaginary numbers. And in one sense, we were right: if we needed to, we'd use a computer. But as Ian Stewart argues in What's the Use? , math isn't just about boring computations. Rather, it offers us new and profound insigh