At a time when the United States is in the grip of an opioid epidemic, many insurers are limiting access to pain medications that carry a lower risk of addiction or dependence, even as they provide comparatively easy access to generic opioid medications. The reason, experts say: Opioid drugs are generally cheap while safer alternatives are…

A serious hidden hazard. Hurricane Irma nearing landfall in Florida on September 10, 2017. NOAA/NASA Hurricanes are an amalgam of the worst weather nature can produce. Not only can a landfalling storm plague entire states with intense winds, pounding rains, surges of seawater capable of flooding entire cities, but they can also spawn tornadoes. Tornadoes during…

U.S. space agency NASA received the final signal from its Cassini spacecraft, which ended a groundbreaking 13-year Saturn mission on Friday with a meteor-like plunge into the planet's atmosphere, transmitting data until the final moment.

Many scientists were stumped by a series of photos of an unusual creature that washed ashore in Texas City, Texas after Hurricane Harvey flooded the gulf cities. But now, one person thinks they've identified the mysterious thing some were calling a "sea monster."

As a longtime resident of Manchester, Guadalupe Hernandez is used to the chemical smells that waft through his southeast Houston neighborhood, a low-income, predominantly Hispanic community near a Valero Energy refinery.

Human evolution can seem like a phenomenon of the distant past which applies only to our ancestors living millions of years ago. But human evolution is ongoing. To evolve simply means that mutations – the accidental changes to genes that happen normally in the process of copying DNA – are becoming more or less common in the population over time.

Your schedule could be killing you

Modern lifestyles are at war with the way our bodies evolved to function. It is 7 p.m. on a spring Friday, and the Highland Hospital emergency room in Oakland, one of the busiest trauma centers in northern California, is expecting. When the patient—a young bicyclist hit by a car—arrives, blood is streaming down his temples. From…

The end is nigh for the monarch butterfly. Image credits Billings Brett / USFWS. Tradition dictates that every year, the American West Coast dons a fluttery, black-and-orange coat with the migration of the monarch butterflies (Danaus plexippus). But in recent decades, that coat has become thinner and frailer, an indication that something isn't quite right with…

If you speak to someone who has suffered from insomnia at all as an adult, chances are good that person has either tried using marijuana, or cannabis, for sleep or has thought about it.

There’s been a devastating trail of destruction and flooding along the east Atlantic coast in the last few weeks following Hurricane Harvey and now Hurricane Irma. The latter, currently moving across Florida, is the strongest sustained hurricane ever recorded in the Atlantic outside the Caribbean and Gulf of Mexico.

CNN's Sara Sidner may have had the toughest job of any of the network's reporters early Monday morning as she tried to report despite hurricane-force winds that deformed her face as she talked.

ELLIJAY, Ga. - Louise Lowman Lee remembers stories about her great-grandmother being put in a fenced area in the backyard, so she could wander safely. She watched her mother patiently care for her grandmother, who lost her reason, inhibitions, and ability to care for herself. Then Alzheimer's disease gradually eroded the brain of her devoted mother,…