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Ants are so important to our ecology that some scientist fell that if ants ever disappear so might humans! SOY UNA SEMILLA es un libro de la serie Hola, lector! que muestra la diferencia entre dos semillas, asi como su evolucion hasta llegar a convertirse en plantas. Los ninos disfrutaran del texto dinamico con el que esta escrito este libro.

Examines the life and work of the British physicist who overcame the challenges of ALS to become one of the foremost scientists of the twentieth century.

A New York Times best-seller and winner of the ABBY Award features lavish illustrations of Native American settings and shares Chief Seattle's environmental message for "helping preserve what is being lost."

Now in Spanish—Who makes sure my suitcase gets on the right plane? This book is full of fascinating facts about everything from Halloween to braille to fire trucks.