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Sea otters use rocks as tools, what that reveals about mammalian intelligence and cognition
The Rock in the Armpit Before a sea otter dives for a clam, it often tucks a flat stone under its forearm, a pocket it keeps ...
Nine in ten humans on Earth favour their right hand — a population-level bias so entrenched that it has persisted across every culture, era, and geography ever documented. No other primate species ...
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