the evolution of trilobites

What Happened to the Trilobites?? The Ordovician period was a time of great change. The Cambrian explosion had resulted in almost every major phylum of organisms evolving in a period of 40 million years (Freeman & Herron, 1998). It was also a time of the great radiation. This allowed existing life forms to develop adaptations and variations, which led to new species (Droser et al. 1996). This also allowed a huge diversity of species, especially in comparison to today. …

…This may be partly due to rise of the human species and the loss of much of the habitat required for such diversity. Man’s existence has changed the environment and affected many of the inhabitants as well. The endangered species of today are numerous and a real concern to many people. It leaves many of us asking if they have stopped evolving or have humans just made it impossible for many species to adapt?