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The '''Ordovician period''' is a theorized second period in the theorized [[Paleozoic]] era. It is posited that it started approximately 500 million years ago after the end of the theorized [[Cambrian]] era. Most of the phyla which are living today is posited to have existed at the beginning of the Ordovician period by those who assert that the earth is billions of years old. [[Theory of evolution|Evolutionary]] scientists assert by the end of the Ordovician period, the first land plants, bryophytes, evolved and began to colonize the land. The Ordovician also is claimed to have seen the [[evolution]] of [[fish]]. The Ordovician is posited to have preceded by the [[Cambrian]] era  and succeeded by the [[Silurian]] era.

The '''Ordovician period''' is a theorized second period in the theorized [[Paleozoic]] era. It is posited that it started approximately 500 million years ago after the end of the theorized [[Cambrian]] era. Most of the phyla which are living today are posited to have existed at the beginning of the Ordovician period by those who assert that the earth is billions of years old. [[Theory of evolution|Evolutionary]] scientists assert by the end of the Ordovician period, the first land plants, bryophytes, evolved and began to colonize the land. The Ordovician also is claimed to have seen the [[evolution]] of [[fish]]. The Ordovician is posited to have preceded by the [[Cambrian]] era  and succeeded by the [[Silurian]] era.

== Young earth creation scientists view ==

== Young earth creation scientists view ==