Species
It is not known how many species there are on planet Earth. Species are found almost everywhere on the planet including deep down in the oceans where only the latest submersibles can reach them.
Approximately 1.5 million species have been identified and named. However it is thought that there are at least 10 million different species on the planet and the vast majority may not even have been seen by human beings let alone identified and named!
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 grey squirrel author:DAVID ILIFF GNU Free Documentation License version 1.2 |
A species is defined as those lifeforms which can breed with each other and produce fertile offspring that are, in the main, identical to the parents.
Describing species and classifying them is the science of taxonomy.
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