The study of fossils and the exploration of what they tell scientists about past climates and environments on Earth can be an interesting study for students of all ages.
(they; tell; scientists about past climates and environments on Earth) (The study of fossils and the exploration of what they tell scientists about past climates and environments on Earth; can be; an interesting study for students of all ages)
they The study of fossils and the exploration of what they tell scientists about past climates and environments on Earth
tell can be
scientists about past climates and environments on Earth
an interesting study for students of all ages