Humans have always been searching for a cure for aging, but researchers claim to have developed a mathematical proof that shows it's impossible to avoid.

All that eggnog (or Champagne, or hot toddies) sounded good at the time, but now you're paying the price. We've got you covered.

The bandage uses a thickening agent known as kappa-carrageenan, obtained from seaweed, to create injectable hydrogels.

New studies on cancer are paving the way for faster diagnosis, better treatment — and more lives saved.

Stunning 3-D videos capture the drama of life on a subcellular level.

More than 400 people have had problems filling EpiPen prescriptions. Maker Mylan has had "intermittent supply constraints," which may reduce availability.

On the way to a palliative care facility, cancer patient Ron McCartney had one request: a caramel sundae.

Hailey Dawson has a 3-D printed hand and team spirit for days.

STIMO (STImulation Movement Overground) involves physical therapy and targeted electrical stimulation to help the brain regain control over paralyzed muscles.

Human-based pathogens are showing up in penguin poop, and that could spell serious trouble for the Antarctic birds.

The secret to chicken soup's medicinal properties have been revealed by dietician Sandy Allonen.

The medicinal soil called "healing soil" has been found to contain powerful antibiotics that kill superbugs.

Black women's contributions to society have often been overlooked, yet these pioneers in science, technology and medicine have changed history.

If you have trouble performing these tests, your life could be cut short.

To solve organ shortages, some places are making it the norm to have people opt out of organ donation.

Airbnb is offering free housing for cancer patients and the people who care for them.

Looking at calcium and vitamin D supplements, researchers found no difference in the health outcomes for people who took supplements and those who didn't.

The Ozark chinquapin tree was believed to have been wiped out by blight, but it has slowly resurfaced.

The quirky Joshua tree may be nearly gone in 50 years if we don't battle climate change.

Michigan state parks are teaming up with Bob Ross Inc. to plant lots of 'happy little trees.'

These storied specimens have been shortlisted for Britain's Tree of the Year contest.

Officials are warning people near the Tennessee coal ash spill to stop drinking well water after finding high levels of arsenic.

NASA loses a CO2 monitoring satellite, plans for new coal plants are being shelved, and the price of CO2 credits drops out on the European market.

Recession? What recession? Step right up as the coal industry is loading up on lobbyists.

Ashely Judd, newly minted foe of mountaintop removal mining, will be chatting live about the evil practice in about an hour on Daily Kos.

After nearly 100 years of burning coal to heat and cool Congress, the U.S. Capitol Power Plant will switch over to less harmful natural gas.

Drinking water near last year's billion-gallon coal ash spill in Tennessee is choked with arsenic and lead, and TVA is shipping cleaned-up coal ash to poor comm

The EPA announced a plan to tighten up rules governing the environmentally destructive practice of mountaintop removal mining.

Movie star Darryl Hannah and NASA scientist Dr. James Hansen were arrested along with dozens of others after blocking access to a coal facility.

MNN's Karl Burkart closed his Chase Bank account to protest their financial support of mountaintop removal mining. What can you do to help?

A note-perfect 'clean coal' parody site has become the talk of the Internet. With its Coal Cares campaign, the heretofore unknown activist group Coal is Killing

Here are the winners and highly commended images from the 2019 Comedy Wildlife Photography Awards.

The New York City Department of Sanitation launches the BetterBin design competition in search of revamped litter receptacles.

From Vietnam to London to rural Boone County, Iowa, these fancy footbridges are a feast for the eyes.

Despite an uptick in public spending, 30% of city residents live more than a 10-minute walk from the nearest park, according to the 2018 City Park Facts report.

Plucking litter from canals while sightseeing is one of the more singular ways to spend a couple hours in the Dutch city.

How do you squeeze a fancy new 407-acre state park into Brooklyn? Look no further than two former landfills on Jamaica Bay.

St. Louis, Orlando and Minneapolis are featured in a new Sierra Club report on the growing number of American cities rejecting fossil fuels.

The two cities will receive substantial financial and technical assistance from Bloomberg Philanthropies to help combat combat climate change.

The town of Ipswich has been haunted by a nursery rhyme playing over a loudspeaker for more than a year.

Migration forecasts developed by researchers at Cornell University help cities and building owners determine the best time to flip the switch.

London, Houston and Bangkok are among the cities most vulnerable to sea level identified in a new report by London-based charity Christian Aid.

Critics of the Via Verde project in Mexico City argue that making a busy beltway more aesthetically pleasing only encourages motorists to keep driving.

A new report from the Health Effects Institute says are breathing air that's considered unsafe by the World Health Organization.

A new retrospective study finds that 1980s-era cleanup of Boston Harbor was well worth it from a return on investment standpoint.

Developed by the U.S. Geological Survey, the technology 'aims to reduce the impact of earthquakes and save lives and property.'

The views along Camden's trash-strewn transportation corridors are getting a $1 million boost from Bloomberg's Public Art Challenge.

Located on the Mississippi Flyway, Chicago is one of the deadliest American cities for migrating birds. But the Windy City is trying to change that statistic.

Mayor Bill de Blasio's $10B climate resiliency plan would extend the Manhattan shoreline by as much as 500 feet into the East River.

Researchers from the University of Wisconsin-Madison find that city blocks with 40% or more tree coverage are naturally cooler than blocks with fewer trees.