Hello, welcome to the best of science. I'm Hannah Frye. And I'm Michael Stevens. We're starting

today, Michael, have you held on to any body parts? You know, children's teeth, for example,

would be the normal one. My daughter hasn't lost teeth yet, but my mother still has all of my

baby teeth in a little container in her cabinet in her kitchen that's I'm

somewhere between adorable and creepy I know right but it's not creepy I have kept all of my daughter's

teeth actually yeah and I'm not sure which one's which oh because you've got multiple multiple

daughters but don't you have separate containers for them I probably should, yeah. Because my mom has kept mine and my sister's teeth, like, labeled. Now, I only have one child. So when I look and I find an old dried up piece of umbilical cord, I know that it's hers. But I've kept that. I've kept cuttings from my daughter's first haircut. Oh, you know what? This isn't a body

part, but I kept a bandage from my cat because when I took the bandage off, the bloodstain on it

was a perfect heart shape. I mean, perfect, like uncanny. I'll just show you a photo later.

If I can find one, we'll put it in the episode. I was just using some industry terms.

But that's it. Oh, and of course my bag of beard hair. Wait, tell me that you did not bring your bag of beard hair with you. I didn't bring my bag of beard hair, but I once shaved my beard off for charity. And there was way more beard hair than like we could in good conscience give a person. So, so I, but I kept the rest of it because I'm like, my beard won't be this color forever. It's turning gray. So I should keep some samples from

before it turned gray. And I've just got a little Ziploc bag of it pinned onto my pegboard as like a

memory. Okay. I mean, if you think that's getting towards creepy, you're not alone.

But also, just you wait until what we've got lined up in this episode.

I was me talking to the list as rather new.

No, Michael, that's perfectly normal, keeping hold of all of that stuff.

Thank you.

It is interesting that your mum has still got your teeth because aren't they yours?

That's right. They're not hers. Does she own them? I mean, she'd give them to me if I asked, but could she sell them?

Hmm. Or do you own them? Do you even have rights to them? I mean, they've left your body.

Yeah, what if she refused to give them back? What a judge compel her to?

Those are the kind of questions that we're going to be answering today, specifically about

...