Latest Chris Doughty Stories

Even before the dawn of agriculture, people may have caused the planet to warm up, a new study suggests.Mammoths used to roam modern-day Russia and North America, but are now extinct"”and there's evidence that around 15,000 years ago, early hunters had a hand in wiping them out. A new study, accepted for publication in Geophysical Research Letters, a journal of the American Geophysical Union (AGU), argues that this die-off had the side effect of heating up the planet."A lot of people still...