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"Two vital parts of mentally organizing the world are classification, or the understanding that similar things belong in the same category; and induction, an educated guess about a thing's properties if it's in a certain category. ... 'For the last 30 to 40 years it has been believed that even for very young children, labels are category markers, as they are for adults,' explains psychologist Vladimir M. Sloutsky ... To test their hypothesis, the psychologists showed pictures of two imaginary creatures to preschoolers and college undergraduates. Both animals had a body, hands, feet, antennae, and a head. ... The difference arose when the head was a jalet's but [the] label was "flurp," or vice-versa. Then, most of the adults went with the label (we accept that a dolphin is a mammal, even though it looks and swims like a fish). The children relied on the head for identification. Regardless of its name, a thing with a jalet's head is a jalet." Link to the study (PDF): http://cogdev.cog.ohio-state.edu/Papers/2011/SD-VS-PsychScience.pdf

Researchers at Harvard University have found that humans aren't the only ones who can groove to a beat - some other species can dance, too. The capability was previously believed to be specific to humans. The research team found that only species with the capacity for vocal mimicry, that is, copying sound, seem capable of beat induction, the ability to discern the beat in music. Beat induction also enables such actions as clapping, making music together and dancing to a rhythm. The data suggests that some of the brain mechanisms needed for human dance may have originally evolved to allow us to imitate sound.