Hi, we've got three stories from Curiosity.com to help you get smarter in just a few minutes.

I'm Cody Gough.

And I'm Ashley Hamer.

Today, you'll learn why late buses cluster in threes,

and which one you should choose,

why the National Science Foundation wants to hear your big questions,

and how long you should date someone before getting married, according to research.

Let's satisfy some curiosity.

Have you ever been waiting for a city bus for what feels like forever when suddenly three in a row pull up to the curb?

Believe it or not, there's actually a lot of research into this phenomenon.

For you bus riders listening on your commute, we're going to tell you

why it happens and which bus to get on. This used to happen to me all the time.

Yeah, me too. Well here's how bus clustering or bunching works. First, bus one gets delayed for whatever reason.

Traffic, loading a bike, riders paying their fare and coins.

Whatever, why do people do that?

When that bus gets to the next stop it has to load more people because riders who are

running late get to catch it since bus one is picking up those late passengers

bus two has fewer passengers to pick up.

So it moves on faster and catches up to bus one.

And the gap between the two buses keeps getting smaller,

since bus one keeps arriving late, picking up more riders,

and running even further behind schedule.

...