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Blood chemistry reveals why some animals bleed blue, green or purple

Whether it's gushing from a bumped nose or pooling atop a pricked finger, our blood is some hue of red. But red-bloodedness isn't universal in the animal kingdom. In some creatures, the vital fluid is purple; in others it's yellow, green or even white.

Blood chemistry reveals why some animals bleed blue, green or purple

We haven't written up this one. Phys.org has the full story — the link below goes straight to it.

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