In addition to their natural beauty, the shells of two deceased specimens of Hawksbill sea turtles hold clues to the growth rates and sexual maturity of the endangered species. Radiocarbon dating of atomic bomb fallout found in sea turtle shells can be used to reliably estimate the ages, growth rates and reproductive maturity of sea turtle populations in the wild, a new study led by Duke University and NOAA researchers finds.

A study recently published in the American Journal of Managed Care found that more than half of primary care providers reported that they made what they considered unnecessary referrals to a specialist because patients requested it. Many physicians said they yielded to patient requests for brand-name drug prescriptions when cheaper generics were available. This study was conducted by Sapna Kaul, assistant professor of health economics in The University of Texas Medical Branch at Galveston department of preventive medicine and community health, in collaboration with researchers from the Massachusetts General Hospital and Harvard Medical School.

Researchers counted cells in plates, using different solutions in each plate, to determine changes in cells. A team of researchers from Colorado State University has been studying DNA damage in living cells to learn more about how genetic abnormalities arise. It has long been known that DNA molecules in every cell get constantly damaged by things from the outside environment, like sunlight, cigarette smoke and radiation. However, more recently researchers have discovered that sources from within the cell itself can sometimes be even more damaging.

In October, an interdisciplinary group of scientists proposed forming a Unified Microbiome Initiative (UMI) to explore the world of microorganisms that are central to life on Earth and yet largely remain a mystery. An article in the journal ACS Nano describes the tools scientists will need to understand how microbes interact with each other and with us.