Ancient Teeth Reveal Social Stratification Dates Back to Bronze Age Societies

Humans have a history of status division stretching back at least 4,000 years In ancient Rome, the wealthy patricians ran the empire. The second-class plebeians worked the farms, baked the bread and built the walls. The rest of the workforce—a full third of the Roman population—were slaves. Human history is, …

Latitude Adjustment: Distance from the Equator Shapes Our Thinking

Climate differences are associated with varying happiness, individualism and aggressiveness. In the past decade, psychologists have made a welcome leap, expanding beyond a narrow focus on the North America, Europe and Australia in their research to include people from all over the world. One benefit has been greater insight on global distribution …

One billion people, many in poor countries, have major vision problems that could be fixed

At least 1 billion people live with moderate to severe vision impairment, such as glaucoma or age-related far-sightedness, that could have been prevented or could be corrected with glasses, cataract surgery, or other means, says a report released Tuesday by the World Health Organization (WHO). The burden is disproportionately high in women …

Drug tailored to one girl with brain disease paves way for similar customized treatments

After their apparent success treating a young girl with a drug tailored to counteract a genetic mutation that had given her a usually fatal brain disease, the researchers behind the innovative strategy have this week laid out criteria for similarly helping more sick children. But the U.S. Food and Drug …

Gene editing can make fruit flies into ‘monarch flies’

Only three molecular changes are needed for fruit flies to digest milkweed toxins. Gene-edited fruit flies have gained some of monarch butterflies’ superpowers — specifically, the ability to digest milkweed toxins and become poisonous to predators. Making just three genetic changes turned regular fruit flies into “monarch flies,” able to withstand plant …

Why robots will soon be picking soft fruits and salad

It takes a certain nimbleness to pick a strawberry or a salad. While crops like wheat and potatoes have been harvested mechanically for decades, many fruits and vegetables have proved resistant to automation. They are too easily bruised, or too hard for heavy farm machinery to locate.But recently, technological developments …

Hurricane Dorian sets sights on Canada after North Carolina landfall

After raking the Outer Banks of North Carolina on Friday, Hurricane Dorian raced through the Atlantic Ocean night on a path that might take the storm across Nova Scotia on Saturday.Forecasters with the National Hurricane Center said the Category 1 hurricane will pass southeastern New England on Friday and Saturday. …

Fires destroy more than 4.2 million wild acres in Bolivia

It’s not just the Brazilian Amazon burning — fires in Bolivia have ravaged more than 1.7 million hectares (4.2 million acres) of land, according to Bolivian officials. That’s more than double the damage from just two weeks ago.Fires are leaving blackened trees and ash-covered forest floors in their wake. The website of …