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מינים שונים לעיתים תלויים האחד בשני. דייוויד גונזלס מתאר את היחסים המופלאים בין ציפורי הנקר קלארק ועצי האורן לבן הקליפה, כדי להדגים את התלות ההדדית הידועה כסימביוזה.
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 »
Translated into Hebrew by Ido Dekkers
Reviewed by Ron Bentata
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