Hey there, night owls. Right now, as you're lying there getting comfortable,

billions of red blood cells are racing through your veins, carrying tiny molecular AD tags,

ancient passports stamped by evolution millions of years ago. Every ape has one.

Every gorilla, every chimp, every primate on this spinning rock.

But here's the thing. About 15% of you listening right now, your passport

is missing a stamp, a protein that every other primate carries, you just don't have it.

And nobody can fully explain why. This isn't some minor genetic hiccup. This is a biological

puzzle that weaves together medicine, ancient history, royal bloodlines,

and yes, even alien conspiracy theories. We're talking about blood that, by all evolutionary

logic, probably shouldn't exist at all. So before we dive into this rabbit hole, drop a comment,

where are you watching from tonight? What time is it in your corner of the world?

I genuinely want to know who's joining me on this strange journey through your own veins.

Now dim those lights, get cozy, and let's talk about the secret history flowing through

15% of humanity. This one's going to get weird. Let's go. So let's rewind the clock a bit. Actually,

let's rewind it quite a lot, back to a time when doctors genuinely believe that pumping animal

blood into humans was a perfectly reasonable medical procedure. We're talking about the 17th century,

when the cutting edge of medical science looked less like a laboratory and more like a

barnyard. The year was 1667, and a French physician named Jean-Baptiste-Denie had what he

considered a brilliant idea. One of his patients, a young man suffering from a persistent fever,

wasn't responding to the standard treatments of the era, which, to be fair, mostly consisted

of bloodletting, leeches and prayers. Dennis reasoned that if the problem was bad blood,

why not simply replace it with good blood? And what could possibly be healthier than blood

...