Blue blood may look alien, but it’s one of evolution’s most elegant solutions to life in extreme environments. Here’s how ...

Blue is one of the rarest colors in the animal kingdom, and unlike other pigments found in nature, most blue creatures don’t actually produce blue pigment. Instead, their color comes from structural ...

Some animals do not have red blood like humans. From spiders to octopuses, their copper-rich blue blood helps them survive ...

A new study on blue sharks shows that their movement patterns in the open ocean are closely linked to internal energy stores ...

Add Yahoo as a preferred source to see more of our stories on Google. Scientists are only aware of around 1.5 million animals of the millions that have existed since the inception of time, long even ...

Animals with blue eyes are a rare occurrence in nature due to being linked to recessive genetics, mutations, and specific genes. Despite that, many species still have beautifully rich blue eyes. While ...

Little known (its eggs were found only three years ago), seldom seen except in the far South (it stops infrequently on its flight from Baffin Land), is the great blue goose. Last week President Thomas ...