Each title in this new series takes readers on a historical journey, examining how people coped in the past and how they developed ingenious ways to make life safer and less unpleasant. Each book features full-color cartoon-style illustrations and hilarious speech bubbles to heighten interest, making the series attractive even to reluctant readers. Simultaneous.,Describes the beneficial role bacteria provide in soil fertilization, digestion, and other processes, and explores what life would be like without them.,Each title in this new series takes readers on a historical journey, examining how people coped in the past and how they developed ingenious ways to make life safer and less unpleasant. Each book features full-color cartoon-style illustrations and hilarious speech bubbles to heighten interest, making the series attractive even to reluctant readers. Simultaneous.,Describes the beneficial role bacteria provide in soil fertilization, digestion, and other processes, and explores what life would be like without them.,