Extinction

From Tardis Wiki, the free Doctor Who reference
For the audio drama of the same name, see Extinction (audio drama).

Extinction is the end of a species caused by either the death of the entire population or over a long period of time in which the species is slowly reduced in number until the last members eventually die.

Mass extinctions

Major catastrophes could cause hundreds to millions of species to die out all at once. In cases of planetary destruction, all the species native to the planet could be driven to extinction (unless any native species had access to space travel).

Individual extinctions

Species would also go extinct on an individual basis, due to a variety of causes.

Earth extinctions

Other references

Extinction