You’ve probably encountered plenty of mythological creatures like centaurs and mermaids in books and movies. But could these strange hybrids actually exist? Although is is possible for animals from two different species to produce offspring, it doesn’t happen very often.

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There are more than a dozen catalogued stars that make up Hydra the water serpent, but only two others, in addition to Alphard, have proper names: Minhar al Shuja ("the snake's nose") and Ukdah ("the knot").

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