Horseshoe crabs are not much to look at. But beneath their unassuming catcher’s-mitt shell, they harbor a half-billion-year-old secret: a superpower that helped them outlive the dinosaurs and survive all the Earth’s mass extinctions. And what is that secret superpower? Their blood. Their baby blue blood. And it’s so miraculous that for decades, it hasn’t just been saving their butts, it’s been saving ours too.
But that all might be about to change.
Follow us as we follow these ancient critters - from a raunchy beach orgy to a marine blood drive to the most secluded waterslide - and learn a thing or two from them about how much we depend on nature and how much it depends on us.
BONUS: If you want to know more about how miraculous horseshoe crabs are, here's a bunch of our favorite reads:
Deborah Cramer, The Narrow Edge
Richard Fortey, Horseshoe Crabs and Velvet Worms
Ian Frazier, "Blue Bloods" in The New Yorker
Lulu Miller's short story, "Me and Jane" in Catapult Magazine
Jerry Gault, "The Most Noble Fishing There Is" in Charles River's Eureka Magazine
This episode was reported by Latif Nasser with help from Damiano Marchetti and was produced by Annie McEwen and Matt Kielty with help from Liza Yeager.
Special thanks to Arlene Shaner at the NY Academy of Medicine, Tim Wisniewski at the Alan Mason Cheney Medical Archives at Johns Hopkins University, and Jennifer Walton at the library of the Marine Biological Lab of the Woods Hole Oceanographic Institution.
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