horseshoe crab

For decades, humans have harvested the blood of horseshoe crabs, which is used to test whether many of our vaccines and medicines are contaminated with harmful bacterial toxins. But the horseshoe crab harvesting industry has few regulations and a lot of secrecy. NPR investigative reporter Chiara Eisner talks to us about expansion of this industry and why synthetic alternatives to the blood aren't being widely used in the United States.

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Their fossils date back 450 million years and their copper-rich blue blood continues to benefit various medical applications. In this episode of Stuff to Blow Your Mind, Robert and Joe explore the science and history of horseshoe crabs. (Originally published 1/16/2020)

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