The turquoise waters became darker and darker, and squiggly glow-in-dark marine creatures began to glide past in the inky depths like ghosts.
Arctic sea ice this summer shrank to its second lowest level since scientists started to monitor it by satellite, with scientists saying it is another ominous signal of global warming.
U.S. President Barack Obama will establish on Thursday the first national marine monument in the Atlantic, a move that's designed to permanently protect nearly 5,000 square miles of underwater canyons and mountains off the coast of New England.
In a picturesque corner of Afghanistan, a unique conservation effort has helped bring the elusive snow leopard back from the brink and given hope to one of the poorest and most isolated communities on earth.
Visitors to Yosemite National Park will soon have more room to roam after officials on Wednesday announced a 400-acre expansion, the largest in nearly 70 years.
Plastic bottles in Taiwan produced up to 30,000 tonnes of waste this summer, the equivalent to 200 million iPhone 6s, a study produced by water filtration company Brita found.
As Hermine worked its way up the East Coast, scientists deployed several underwater drones they say will help them better understand what sustains and strengthens hurricanes and tropical storms -- and ultimately better protect life and property.
Scuba divers remove a piece of garbage from the bottom of the sea near the Green Island in Taitung County on Thursday, Sept. 8. The Taitung County government mobilized over 100 people to clear the sea floor near the island of garbage on Thursday. The county government pointed out that the amount waste in the sea increased after Typhoon Nepartak hit the island in July. Over 500 kilograms of garbage was removed on Thursday.
U.S. federal authorities took most humpback whales off the endangered species list Tuesday, saying their numbers have recovered through international efforts to protect the giant mammals.
Two months before it hosts the COP22 climate conference, Morocco is preparing to launch an ambitious project to turn its mosques green as a commitment to clean energy.