It makes sense when you think about it, but hybrids have one serious flaw in that they are typically reliant on having both fuel in the tank and juice in the battery in order to work right. Think about it: a Prius has a 76 horsepower gasoline engine and a 67 horsepower electric motor. Taken alone, neither will be very punchy; put together,they can pack a surprising whallop!

This morning, my computer had a little functionality hiccup that got me wondering: why is this even possible?

Q. Why do you buy or rent a DVD?

I’ve been finding, as time goes on, places where multiple technologies have been deployed together, with some sort of common function, but without the level of integration to make the all play together nicely.