Dogs act like toddlers when you need help - but cats just watch. Scientists compared 3 groups: pet dogs, cats, and human toddlers in an experiment where a human parent hides and pretends to look for an object. 75% of dogs and children helped. Cats only helped if it was in their personal interest.
Zapparoli said getting people into "good habits" before they reach 50 would mean "in 30 years time we won't have the same need in the general population as we do now".
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