Scientists have discovered the rarest blood type on Earth, belonging to just one woman. Talk about a lonely hearts club. An unidentified woman from Guadeloupe has the rarest blood type on Earth, to ...

In a routine blood test that turned extraordinary, French scientists have identified the world’s newest and rarest blood group. The sole known carrier is a woman from Guadeloupe whose blood is so ...

To say that blood is vital is a huge understatement. It flows through the organs that make up the circulatory system — the heart and blood vessels and veins — delivering oxygen, nutrients, and ...

An investigation into why blood doesn't always behave as doctors expect has revealed a super-rare mutation in an extremely uncommon variation of blood. Testing more than 544,000 blood samples in a ...

Step aside A, B, and O—there’s a new player in town. Scientists in France have just reported the discovery of a novel, rare blood type, only recorded in a single person to date. The French Blood ...

The following essay is reprinted with permission from The Conversation, an online publication covering the latest research. In a routine blood test that turned extraordinary, French scientists have ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

Most people know their blood type—A, B, AB or O—along with whether they are Rh-positive or negative. But these familiar categories (those letters plus "positive" or "negative") represent just two of ...