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Genetic analysis reveals role of melatonin in ADHD symptom severity

New research published in Psychiatry Research Communications suggests that the hormone melatonin may be closely linked to the severity of attention deficit hyperactivity disorder (ADHD) symptoms in children. A study led by Hamamatsu University School of Medicine found that genetic…

Earthquakes upped the death toll at Pompeii

Nearly 2,000 years ago, a huge volcano in southern Italy suddenly, explosively woke up. Ash and gas from the eruption killed at least 1,500 people in the cities of Pompeii and Herculaneum. That event has gone down in history as…

Explainer: How volcanoes erupt

Some 640,000 years ago, a massive eruption rocked the land that, today, is Yellowstone National Park. The eruption spewed ash across much of the area that’s now the United States. It ejected 6,000 times the volume of the deadly 1980…