While the fossil record is unique in that it documents the presence of life for over 80% of the earth's history, it provides a biased record of past.
(the fossil record; is; unique in that it documents the presence of life for over 80% of the earth's history) (it; documents; the presence of life; for over 80% of the earth's history) (it; provides; a biased record of past)
the fossil record it it
is documents provides
unique in that it documents the presence of life for over 80% of the earth's history
the presence of life for over 80% of the earth's history
a biased record of past