How did the researchers determine these ages? When examining remnants from the past, experts use radiometric dating, a versatile technique that involves counting radioactive atoms of certain elements that are still present in a sample. In Morocco, paleontologists excavated the fossils of a dinosaur that roamed Earth 168 million years ago. On the Atlantic coast of the U.S., archaeologists found oyster shells left by Native Americans more than 4,000 years ago.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |