You’ve likely seen a squirrel dashing around with an oak tree acorn in its mouth. It may be about to eat lunch, or it may be stowing acorns in its pantry for later meals. But where, exactly, are ...

Clearly, the gray squirrel was spending only a few seconds on each acorn. The animal removed the cap with its lower incisors, then proceeded to chip away at the outer shell and the nutritious kernel ...