A study tracking rainfall patterns over thousands of years has found that more arid periods coincided with ages of dynastic ...

found in tree growth rings, according to the statement. Carbon-14 is a naturally occurring radioactive variant of carbon, it forms in the atmosphere when cosmic radiation interacts with nitrogen.

Using growth lines on bones (akin to tree rings) to determine age and telomere length as an indicator of biological aging, the study found no link between radiation exposure and age-related ...

This process, whereby species evolve rapidly to exploit empty ecospace, is known as adaptive radiation ... and 7 species of tree-dwelling insect-eaters. Scientists long after Darwin spent years ...