Scientists Discuss time and how old the Earth is. How do they measure the idea of time so long ago if they were not around to measure it with the technology we
have today? (Minimum 3 COMPLETE Sentences)

The following is the introduction to a special e-publication called Determining the Age of the Earth (click the link to see a table of contents). Published earlier this year, the collection draws articles from the archives of Scientific American. In the collection, this introduction appears with the title, “Stumbling Toward an Understanding of Geologic Timescales.”