Understanding the human body is a team effort. That's where the Yachtel group comes in.

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To learn more about Yachtolt, visit yawcult.co.j.p.

That's y-A-K-U-L-T-C-O-J-P.

When it comes to a guide for your gut, count on Yacult.

This is Scientific American 60-second science. I'm Emily Schweng.

You know how it is when you're driving behind a car and you notice a bumper sticker and you think to yourself, oh, it's that kind of person.

Or why would somebody put that on their car?

Walter Gottlik, a sociology graduate student at the University of Kansas.

I was coming back from a vacation with my family, and I was behind a car, and the bumper

sticker on the car was almost illegible. The type was really tiny, and it said,

when this baby hits 88 miles an hour, you're going to see some serious

shit. This was Gottlick's aha moment. As you may have guessed, the bumper sticker was a reference

to the movie Back to the Future. When this baby hits 88 miles per hour, you're going to see some

serious shit. It's moments like this, on the highway, driving driving at speed that can seem so solitary.

But in fact, there are opportunities to connect and with perfect strangers.

That's what I'm trying to get at, the way that we think about the world based on how we read what other people put on their cars.

To sample the kinds of messages being sent on our roads, Gottlik drove more than 10,000

miles on interstate highways throughout the eastern United States.

He says one major variety of bumper sticker refers to things nearly everyone knows about,

an election, a church, a social issue, but other bumper stickers may require an observer to access what Gottlik calls outside resources.

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