World Topics

Cannabis can relieve pain, but carries risks, study says

Marijuana and cannabis can help to safely alleviate pain for some patients but many uncertainties remain about their health and safety risks, according to a major scientific review published Thursday. A committee of the U.S. National Academies of Sciences, Engineering, and Medicine looked at more than 10,000 scientific abstracts to ...

Climate science bedeviled by 'tipping points'

| Jan 19, 2017

Climate science bedeviled by 'tipping points'

Of the many things that keep climate scientists awake at night, tipping points may be the scariest. To start with, these thresholds for deep, sometimes catastrophic change in the complex web of Earth’s natural forces, caused by man-made global warming, are largely invisible. You ...

Golden-headed moth species named for Trump

Jan 18, 2017

Golden-headed moth species named for Trump

A Canadian researcher has discovered a new species of moth native to Southern California and Baja California. The insect, which measures just over a centimeter wide, is visually striking. Golden flakes cover its head, which the researcher likens to the hairdo of U.S. President-elect ...

Jan 15, 2017

Study uncovers long-term effects of deadly Ebola virus

People who survive Ebola may still battle debilitating health problems a year after being declared infection-free, according to an ongoing trial in Guinea that highlighted the need for patient follow-up. Three-quarters of survivors had post-Ebola symptoms when they enrolled for the trial about a ...

Jan 13, 2017

Did you eat your veggies? Urine test can tell

A simple urine test can reveal whether you had steamed fish or a fat-riddled steak for dinner, and could one day end dietary dishonesty, according to a study published Friday. The test may also boost the health of people suffering from diabetes, obesity or ...

Jan 13, 2017

Scientists activate predatory 'kill switch' in mice

U.S. scientists have ramped up predatory behavior in mice by stimulating a region of the brain known for its role in emotions like fear and pleasure, according to a study published Thursday. The experiment turned the lab mice into eating machines, vigorously attacking food, ...