Discover, Volume 13Time, 1992 - Science |
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able actually animals appear asked atoms become believe birds body brain build called cause cells cloud complete course create developed dinosaurs DISCOVER disease Earth EDITOR effect electron energy engineers example experience explains fact female field genes give hand head human idea issue it's known language least less light living look male means miles million months move natural never normal once organisms percent planet possible problem produce reason researchers result says seems sexual side sleep space species star suggests surface theory there's thing thought tion turned University women