Diets that are low in fiber may cause irreversible changes to populations of gut bacteria, and those changes may be passed on over generations, new research suggests. In experiments, mice that were fed a low-fiber diet lost certain species of the bacteria in their gut...
Tia Ghose
Ozone Hole Won't Heal Until 2070, Nasa Finds
SAN FRANCISCO — The banning of ozone-depleting chemicals hasn't yet caused detectable improvements in the Antarctic ozone hole, new research suggests. Instead, changes in the South Pole's ozone hole from year-to-year are likely the result of natural variations in wind patterns, researchers said here Wednesday...
Tiny Fish May Be Ancestor Of Nearly All Living Vertebrates
A stunningly preserved, soft-bodied fish that is more than 500 million years old could be the ancestor of almost all living vertebrates. The fossilized fish, called Metaspriggina, sports characteristic gill structures that later evolved into jawbones in jawed vertebrates, according to a new study. "For...
Vintage Bling: Ancient Celts May Have Had Shiny Dental Implants
Sparkly, gold grills aren't just for Flavor Flav; ancient Celts may have sought out flashy smiles as well. Archaeologists have unearthed a dental implant in a grave in France that dates to the third century B.C. The implant — an iron pin that may have...