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With over 7, 000 known species, frogs display a stunning array of forms and behaviors. A single gram of the toxin produced by the skin of the Golden Poison Frog can kill 100, 000 people. Male Darwin's Frogs carry their tadpoles in their vocal sacs for sixty days before coughing them out into the world. The Wood Frogs of North America freeze every winter, reanimating in the spring from the glucose and urea that prevent cell collapse. The Book o...

Water and Health in an Overcrowded World, and its associated DVD, takes a global view of public health in discussing the chemical and biological pollution of water, environmental change, poverty, and lifestyle as major contributors to disease and disability in contrasting populations around the world.

Una guida naturalistica dettagliata e di facile lettura con taglio sistematico che permette una classificazione sicura, semplice e diretta. 600 fotografie a colori, 400 specie con descrizioni accurate per una pronta identificazione e per capire il ciclo di vita e i comportamenti dei principali gruppi di rettili e anfibi conosciuti.

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