This story was originally published by Knowable Magazine. 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 ...
An ancient aquatic species that's been around for 450 million years is facing extinction as a series of factors work against the longevity of the living fossil.
Animals Around The Globe is a travel platform focused on wildlife and unique destinations, where you can discover all your favourite animal encounters.
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