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Rôzne druhy často závisia jeden od druhého. David Gonzales popisuje výnimočný vzťah orešnice borovicovej a borovice bielokmennej, aby načrtol vzájomnú závislosť zvanú symbióza.
Amy Smith designs cheap, practical fixes for tough problems in developing countries. Among her many accomplishments, the MIT engineer received a MacArthur "genius" grant in 2004 and was the first woman to win the Lemelson-MIT Prize for turning her ideas into inventions. Full bio »