Temperate zones have seen vast changes in climate during the history of the earth, and these changes have lead to a large number of extinctions.
(Temperate zones; have seen; vast changes in climate; T:during the history of the earth) (these changes; have lead; to a large number of extinctions)
Temperate zones these changes
have seen have lead
vast changes in climate T:during the history of the earth
to a large number of extinctions