Two hormones drive anemonefish fathering, aggression

Two brain-signaling molecules control how anemonefish dads care for their young and respond to nest intruders, researchers report in a new study. Because there are many similarities in brain structure between fish and humans, ...

Why do small dogs live longer than big dogs?

You don't necessarily need a working knowledge of evolutionary theory to know that in the animal kingdom, larger beasts tend to live longer than smaller ones.

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