Scientists have identified a completely new blood type—but here’s the twist: so far, it’s only been found in one woman from Guadeloupe. Researchers say her blood is so unique that, theoretically, she’s the only person in the world who could donate to or receive blood from herself. Now, they’re on the hunt to see if anyone else shares this rare trait.

Editor’s Note: Blood types aren’t just about A, B, or O—this discovery highlights how incredibly diverse human biology can be. While it’s fascinating science, it also raises practical questions: What happens if this woman needs a transfusion? Could there be others with the same blood type out there? Stories like this remind us how much we still don’t know—and why medical research keeps digging deeper.