Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. Blue blood may look alien, but it’s one of evolution’s most ...

Octopuses and spiders have blue blood due to copper-based hemocyanin. Blue blood aids these creatures in surviving harsh, low-oxygen environments. Horseshoe crab blue blood is vital for medical safety ...

Imagine a creature that has three hearts….Surprised? Well, imagine that it also has nine brains and blue blood. Sounds like ...