At school assemblies, corporate events, and weddings, Dave Schulte’s yo-yo spins, sleeps, and swings. He rocks the cradle, fires the gunslinger, and sequences the DNA. As he explains the science ...

Doctors' time is far too valuable to be wasted. Still, not everyone respects it. Every now and then, whether it's for attention, prescription drugs, or skipping class, people attempt to fake a ...