This text for the graduate or advanced undergraduate student assembles the latest information summarizing regional, systematic, and theoretical aspects of the e
Several years ago, we realized that the most prominent ideas that had been ex pressed about the origin and early evolution of the Metazoa seemed to have been de
Recently, new genes and their proteins that revealed striking new insights into the early evolution of multicellular animals have been identified and characteri
The interplay between Geology and Biology has shaped the Earth from the early Precambrian, 4 billion years ago. Moving beyond the borders of the classical core