There are some things you should always check, like the hygiene rating on your local takeaway,

the setting on your razor, and whether the party actually is fancy dress.

The other thing you should check is your Experian credit report, especially if you're looking to borrow money.

It lets you understand what lenders see, so you can increase your chances of getting the best deals.

It's dead easy to check it and completely free.

See it in seconds. Download the Experian app today.

Welcome to Scientific American Science Talk posted on August 4th, 2016. I'm Steve Merski. On this episode,

So we, we like approach the table and he looks at us, and so I dive in, I'm like, oh, hi, I'm Mary Roach, I'm doing this, and I wanted to talk to you. It's going to seem like a really silly topic, but I wanted to have a conversation about diarrhea, and he goes, it's not silly. You can sit down.

As you heard, that's Mary Roach.

She's the best-selling author of Scy. but I wanted to have a conversation about diarrhea, and he goes, it's not silly. You can sit down.

As you heard, that's Mary Roach. She's the best-selling author of such entertaining and informative works

as Gulp, Adventures on the Elementary Canal, and Packing for Mars. Her latest book is Grunt,

The Curious Science of Humans at War. She was visiting New York City recently, so I

visited with her at her Soho Hotel to talk grunt. I don't know if you know this, Mary. We

know each other a long time. I don't know if you know both my parents who were in the Marine

Corps. Both of them? Yes, my mother was also... Your mother was on the front lines.

Well, that was after she got out and was trying to raise me and my siblings.

But so they would...

Both my parents would have, I think, been very interested in your book and especially

the parts that have to do with the Marines.

There's a section in the book where you talk about, well, you're always talking about diarrhea

in all your books pretty much or other bottled functions.

...