Grassland ecosystems can be found on nearly every continent. Countless animals and plants live in them. So what difference could the loss of one animal species make? Follow the chain reaction, and dis
"How did the Universe begin? Who first measured the distance to a star? What is the mysterious force called dark energy? This title tells the amazing story of astronomy, from the ancient belief that a
An overview of DNA describes how it was discovered, research done on genes, why plants and animals are genetically modified, and the pros and cons of using this form of biotechnology.
Explains what cloning is, describes the historical research and development of cloning and discusses Dolly the sheep's role in this process, and introduces the possible implications of cloning other a
