reword this for meh please!
The Triassic follows the largest extinction event in the history of life, and so is a time when the survivors of that event spread and recolonized.The organisms of the Triassic can be considered to belong to one of three groups: holdovers from the Permo-Triassic extinction, new groups which flourished briefly, and new groups which went on to dominate the Mesozoic world.
The Triassic follows the largest extinction event in the history of life, and so is a time when the survivors of that event spread and recolonized.The organisms of the Triassic can be considered to belong to one of three groups: holdovers from the Permo-Triassic extinction, new groups which flourished briefly, and new groups which went on to dominate the Mesozoic world.