QR codes are used everywhere, yet few people understand how they actually function. By constructing one entirely by hand, the experiment exposes the structure and rules hidden inside the pattern. Each ...

Getting your money’s worth out of a car means holding on to it—ideally, for at least several years beyond its warranty period. By then, the car depreciates more slowly, and even as maintenance and ...

J.B. Maverick is an active trader, commodity futures broker, and stock market analyst 17+ years of experience, in addition to 10+ years of experience as a finance writer and book editor. Dr. JeFreda R ...