The 22 states that didn't ease Medicaid eligibility under Obamacare cover a much smaller percentage of their low-income residents than other states do and have seen their costs rise more.
More than 23,000 Americans end up in emergency rooms each year after taking dietary supplements, an analysis shows. Most cases are linked to weight-loss products or energy-boosting supplements.
New research finds that the virus can be present far longer than expected — and that there could be a continuing risk of transmission through sexual contact.
A group that measures river basin health cited the poor condition of infrastructure such as locks and dams, among other things, on what it says is the world's fourth-largest watershed.
Scientists soared through clouds with a new instrument that takes 3-D pictures of the edge. What they learned about the size and density of droplets surprised them and might lead to better forecasts.
But, using images from the Hubble Space Telescope, scientists have learned the great storm is putting up a fight because it is now shrinking at a slower rate.
The Hidden Brain podcast explores the connections between students and teachers. It turns out finding things in common between pupils and instructors could be a tool for closing the achievement gap.
The Environmental Protection Agency has released its much-anticipated ozone standards. The agency is setting more stringent thresholds for the particles that contribute to smog.
Volkswagen faces two enormous repair jobs: fixing its polluting diesel cars and its battered reputation. Both may be much harder to fix than anything other scandal-plagued car companies have faced.