Nature & Environment
Life in the Palaeozoic
...mode of life of some Palaeozoic organisms...Life in the Palaeozoic: 1.1 A burst of evolution - One of the most important events in the history of life began about 545 million years (Ma) ago, i.e. some four billion years after the origin of the Earth, and over 3.3 billion years after the origin of life. The term 'Cambrian explosion' reflects a sudden burst of evolution,...