People from cultures with strict social norms tend to be less skilled at being funny. These findings suggest that the ability to generate humor is not just an inborn personality trait, but a skill heavily shaped by the social rules of the environment in which a person lives.

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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.

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And footage showed orange balls of light flying across the sky over the Haitian capital of Port-Au-Prince, leaving a trail of smoke behind.

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