Paleontology, the study of fossils, has been invaluable in reconstructing prehistoric envrionments, identifying animals and plants living millions of years ago, and tracing the evoloution of living things.
(the study of fossils; has been; invaluable) (animals and plants; living; millions of years; T:ago)
the study of fossils animals and plants
has been living
invaluable
millions of years T:ago