Uploaded July 2026 | Updated September 2026, 1 week ago
Type B blood carriers: This one's for you.
A massive study from Harvard traced human blood types through thousands of years of history and found something scientists didn't expect. Turns out your blood type might be a genetic clue about what your ancestors survived.
23andMe's ancient DNA expert Dr. Éadaoin Harney explains the discovery in this short video. Watch now to find out what your blood might be telling you.
Type B blood carriers: This one's for you.
A massive study from Harvard traced human blood types through thousands of years of history and found something scientists didn't expect. Turns out your blood type might be a genetic clue about what your ancestors survived.
23andMe's ancient DNA expert Dr. Éadaoin Harney explains the discovery in this short video. Watch now to find out what your blood might be telling you.
