"Mr. Mattessich, 23, has devised a pair of small turbines — one spun by the pressure of escaping exhaust and another by steam produced from the exhaust heat — that can generate electricity to help charge a hybrid car’s battery. Systems for scavenging waste heat for electricity have worked at the scale of a giant power plant for decades. But Mr. Mattessich has devised something small enough to fit in a compact car."

What are you doing with your time?

Source: NYTimes.