age

Introduces readers to Earth as a planet, and covers topics from the Northern lights to Earth’s planetary neighbors. Allows readers to unearth the amazing marvels of our truly unique planet.

Chronicles the history of scientific speculation and research on Earth's age, discussing ancient theories, religious beliefs, and the work of scientists that led to the development of geochronology. Also includes a glossary and lists of related organizations, books, and Web sites.

Text and photographs discuss the processes by which scientists determine the age of their specimens, such as counting the number of tree rings, reading the strata, and using chemical analyses and the Carbon-14 test. Also looks at recent findings that may tell us how old the universe is.

Discusses the history of how astronomers came to know the age of the universe, exploring the age of various celestial bodies within the universe and covering the inner workings of scientific inquiry.