I have seen those fancy new kitchen and bathroom faucets where you just touch them and the water goes on or off. How do they work?

I hear both the terms buffalo and bison, and sometimes they seem to refer to the same animal. Is there a difference?

I’ve got some old jewelry lying around the house, and I don’t know if it’s actually made of gold, or just an imitation. How can I find out?

I don’t really remember mine either, unless it’s something really scary. And then, even when I do, I forget it not long after waking up. So why do people have trouble remembering their dreams, and can I train myself to remember them more clearly?

I hear pilots talking about headwinds and tailwinds a lot, but how does the jet stream actually affect my flight? What exactly is the jet stream?

It seems like there are more and more hybrids out there every day, but how do hybrid cars actually work? When it comes to automobiles, What does “hybrid” even mean?

Okay, I’ll bite — ha ha. I see this “Nutella” stuff on the store shelves all the time, and it looks for all the world like chocolate in a jar. It’s not just chocolate in a jar, is it?

How often do you really need to clean your kitchen sponges, and what’s the best way to do so?

What are the rules and regulations involving traveling via airplane with a pet?

What is the difference between agnostic and atheist? I hear these terms used quite a bit, but I have to be honest, I’m not entirely clear on the difference.  Can you tell me what makes an agnostic, and what makes an atheist?

After I toss my empties into the recycling bin and haul it to the curb, where do my bottles and jars go, and what happens to them?