fossils provide a vital record that enables scientists to understand past life on Earth and to study why species became extinct during different periods of geologic time."
(fossils; provide; a vital record that enables scientists to understand past life on Earth and to study why species became extinct during different periods of geologic time) (a vital record; enables; scientists; to understand past life on Earth and to study why species became extinct during different periods of geologic time) (scientists; to understand; past life on Earth) (scientists; to to study; why species became extinct during different periods of geologic time) Context(scientists to to study,List([44, 100))):(species; became; extinct; T:during different periods of geologic time)
scientists to to study,List([44, 100))
fossils a vital record scientists scientists species
provide enables to understand to to study became
a vital record that enables scientists to understand past life on Earth and to study why species became extinct during different periods of geologic time
scientists to understand past life on Earth and to study why species became extinct during different periods of geologic time
past life on Earth
why species became extinct during different periods of geologic time
extinct T:during different periods of geologic time