Welcome to the Voice of America’s News Words.Scientists have discovered that songbirds,like humans,learn to make sounds by copying what they hear.Hypothesis.Songbirds and humans have a similar brain structure for learning sound,say researchers at Rockefeller University.Scientist Erich Jarvis formed a hypothesis that molecules guide brain connections that create paths to the voice box,permitting the copying of sounds.A hypothesis is an idea or theory that is not proven.Forming a hypothesis is the first step in the scientific method.

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