For decades, scientists have relied on tree rings to estimate how long trees can live. But new research suggests that this widely used method may have been underestimating the lifespan of many ...

Dedicated at the University of Chicago on October 10, 2016. In 1946, Willard Libby proposed an innovative method for dating organic materials by measuring their content of carbon-14, a newly ...

The development of a high precision record of atmospheric radiocarbon shifts beyond 14,000 calendar years BP - obtained through combined studies (e.g., dendrochronology, radiocarbon dating and ...

One of the more significant challenges archaeologists deal with while investigating any archaeological site is determining how old it is. At sites with historic materials, items such as bottles, jars, ...