External, ecological factors like these were undoubtedly important in creating the opportunity for the Cambrian explosion to occur. Internal, genetic factors were also crucial. Recent research ...

The Cambrian Explosion saw an incredible diversity of life emerge, including many major animal groups alive today. Among them were the chordates, to which vertebrates (animals with backbones ...

Something dramatic happened about 500 million years ago called the Cambrian "explosion," during which an incredible diversity ...

External, ecological factors like these were undoubtedly important in creating the opportunity for the Cambrian explosion to occur. Internal, genetic factors were also crucial. Recent research ...