The U.S. population is older than ever, and that trend is accelerating. As baby boomers age and birth rates decline, the country is heading toward a demographic reality that Japan has been grappling ...

Add Yahoo as a preferred source to see more of our stories on Google. Nearly 30% of Japan's population is 65 or older, and many still work.Francesco Riccardo Iacomino/Getty Images Japan has adapted to ...

With Japan's rapidly aging population putting mounting pressure on medical and nursing care systems, local governments are increasingly turning to an unexpected tool in dementia prevention: early ...

Across the world, water scarcity is emerging as one of the most pressing challenges of the 21st century. Climate change is pushing rivers and aquifers into unprecedented extremes, droughts and floods ...