For thousands of years human infants in the first year of life have squirmed, kicked, rolled, crawled, gurgled, cried, laughed, panted, sucked, waked, slept and submitted with good humor or bad grace to endless ministrations. For thousands of years all of these doings were of supreme importance only to their mothers and, sometimes, their fathers. But for seven years such typical, normal baby actions have seemed to a kindly and learned man in New Haven to be of supreme importance to Science. Fruit of that belief appeared last week in the form of a...
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