Plague is often depicted as shifting the course of human history, but scholars say an outbreak that has been blamed for the demise of the Roman Empire likely didn't kill half the world's population in just a few years.
As a toxic red tide continues to grip the coast of southwest Florida, one county saw the highest number of sea turtle deaths it has ever recorded for a single month in October.
Starting in the summer of 2017, Colleen Gill's strolls on the beach were often interrupted by the smell of death.
Authorities in China have approved a drug for the treatment of Alzheimer's disease, the first new medicine with the potential to treat the cognitive disorder in 17 years.
YouTube star MrBeast wanted to do something big to celebrate reaching 20 million subscribers, so his fans challenged him to plant 20 million trees.
If you're looking for a reason to care about tree loss, this summer's record-breaking heat waves might be it. Trees can lower summer daytime temperatures by as much as 10 degrees Fahrenheit, according to a recent study.
As summer temperatures finally begin to cool, weary New Yorkers flock to city parks and find themselves drawn, irresistibly, to the many tranquil ponds and pools of water. Beautiful, certainly, but in some cases deadly.
Just because kids are going back to school and store shelves are filling up with Halloween goodies doesn't mean summer is over yet. In fact, in North Dakota, the bright fields of sunflowers are just reaching their peak, and they're a perfect place for tourists who don't want to let go of the summer sunshine.
Dog owners in the Southeast are spreading the word about the dangers of contaminated water following the deaths of their beloved pets.
A doggy play date in a North Carolina pond turned tragic after three pups died from toxic algae. Now, their owners say they hope their loss will educate fellow dog lovers about the dangerous blooms.
Six beaches around Saint-Brieuc in the French region of Brittany have been closed to the public due to unmanageable quantities of sea lettuce, which local campaign groups say may be linked to two recent deaths in the area.
Summer's the perfect time to hit the beach -- unless you live in Mississippi.
A record-breaking mass of smelly seaweed stretching from West Africa to the Gulf of Mexico has been identified using satellite imagery.
