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Blood Types Are Weirder Than You Think

Season 13 Episode 8 | 16m 20s

Across life on Earth, blood comes in blue, green, purple, even clear. But why? And what makes your blood different from mine? This is the strange world of blood—what it does, why it varies, and why we can’t live without it.

Aired: 07/09/25
Extras
Learn about Elie Wiesel, Holocaust survivor and Nobel Peace Prize-winning author of Night.
Historian Annette Gordon-Reed. The American Revolution premieres November 16.
A single shot echoes on Lexington Green, and the American Revolution begins.
The filmmakers on how understanding the people of the Revolution can help us understand who we are.
Filmmakers discuss how they used stories of both well-known and lesser known figures.
The filmmakers discuss how the story of The American Revolution came together.
The filmmakers discuss how they crafted imagery to help tell the story of the American Revolution.
John Adams, read by Paul Giamatti. The American Revolution premieres November 16.
A spark ignites—quiet, unstoppable. What follows changes everything.
The filmmakers on how they tapped a broad range of influences to recreate the music of the era.
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