You're listening to Boldproof Radio with Dave Asprey.

Today's cool fact of the day is that your hair doesn't keep any secrets.

It turns out your hair contains information about pretty much everything that's been

in your bloodstream, including drugs, heavy metals, and is one of the most commonly used

types of forensic evidence.

But one thing that no one can tell from looking at just your hair is whether you're a man

or woman because men's and women's hair is identical in structure.

But if they get the follicle, they can probably genetically sequence that.

But your hair shaft itself is made up of keratin, which is the same protein that horns,

hooves, claws, feathers, and beaks are made of.

And studies in fetal nylon crocodiles, bearded dragon lizards, one of which I had as a

pet as a kid.

And corn snakes appear to have settled longstanding debate on the rise of skin coverings.

Special skin bumps that we've known for a long time direct the development of hair and

mammals and feathers and birds also turn out to signal scale growth and reptiles, which

means all three of them evolved from a shared ancestor, at least that's according to a

study in 2016, which is kind of cool and kind of creepy, which means maybe someday,

we'll be able to transform your hair cells so you can grow scales on your head.

Would that be cool or what?

Talk about having control of your own biology.

I think it'd be awesome to have a bearded dragon tough, at least for Burning Man.

Now, today's guests might have been to Burning Man.

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