Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Oldest living things on earth.?

If you have ever wanted to see or have seen the California redwoods, you will enjoy this book. Richard Preston got so interested in the trees that he learned to climb them--a feat equal to mountain climbing and just as dangerous, so he could experience them first hand. These ancient plants, thought to be between 2,000 and 3,000 years old, are a world apart from any other plants living today. Because they are so unusual, individual trees have been named, climbed, measured, and thoroughly explored from the ground to the tip. The exact location of the tallest specimens is a well kept secret by the botanists who have studied them. Richard Preston's book, which reads like an adventure novel, is a very good read about a most unusual subject.