Horseshoe crabs, with their alien appearance and mysterious blue blood, are not the crabs they’re named for, nor are they relics to be ignored. These magnificent survivors date back hundreds of ...

When our blood mixes with oxygen, it turns red, but horseshoe crab blood turns blue, which is key to its value in the medical field. “The copper has these special coagulating properties ...

Blood is often associated with the color red, but in the animal kingdom, it comes in a surprising range of hues. From the ...

Horseshoe crabs are commonly referred to as 'living fossils.' They have existed for more than 200 million years, even ...

Their yellow blood contains vanadium, which helps them transport oxygen. Their blue blood, containing hemocyanin, aids in oxygen transport in various habitats. They have a unique circulatory system ...

The pharmaceutical industry has long relied on a test that uses a protein called LAL taken from the blood of American ...

Biomedical companies also harvest horseshoe crabs and drain their blue blood, which is used to detect toxins in drugs and medical devices. Horseshoe crab blood harvests have virtually doubled since ...