marine habitats ideal for spawning new life-forms. Nevertheless, the scale of the Cambrian Explosion is likely exaggerated due to the proliferation of hard-bodied animals that fossilized much more ...

Although these new life-forms spread worldwide ... betta fish owes its body construction to early chordates in the Cambrian such as Pikaia gracilens (the fossil shown here).

Others propose that an extinction of life just before the Cambrian opened up ecological roles, or "adaptive space," that the new forms exploited. External, ecological factors like these were ...

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

The control system that may have emerged at the Cambrian explosion is known as ... leading to the emergence of more complex and adaptable life forms. Today, all animals with tissues as we know ...

Others propose that an extinction of life just before the Cambrian opened up ecological roles, or "adaptive space," that the new forms exploited. External, ecological factors like these were ...