U.S. wildlife officials have agreed to revise the critical habitat designation for Florida manatees, which have been dying in record numbers because water pollution is killing a main food source.

The U.S. Fish and Wildlife Service said in a court settlement made public Wednesday that it will publish a proposed revision by Sept. 12, 2024. The agreement comes in a long-running court case involving the Center for Biological Diversity, Defenders of Wildlife and the Save the Manatee Club.

Scientists have discovered the world's largest plant off the Australia coast — a seagrass meadow that has grown by repeatedly cloning itself.

Genetic analysis has revealed that the underwater fields of waving green seagrass are a single organism covering 70 square miles (180 square kilometers) through making copies of itself over 4,500 years.

A quick-thinking custodian safely confined a curious cougar in an empty classroom after it entered a Northern California high school Wednesday morning, authorities said.

The custodian was opening Pescadero High for the school day when the juvenile mountain lion was spotted, said Detective Javier Acosta with the San Mateo County Sheriff's Office. No students or teachers were on campus at the time, Acosta said.

Hurricane Agatha made history as the strongest hurricane ever recorded to come ashore in May during the eastern Pacific hurricane center, making landfall on a sparsely populated stretch of small beach towns and fishing villages in southern Mexico.

The storm came ashore in Oaxaca state Monday afternoon as a strong Category 2 hurricane, with maximum sustained winds of 105 mph (165kph), then it quickly lost power as it moved inland over the mountainous interior.

France will put down a killer whale stranded for weeks in the River Seine, after attempts to lead the animal out to sea failed and revealed it is severely sick, local authorities said.

To reach the only place in the world where cave paintings of prehistoric marine life have been found, archaeologists have to dive to the bottom of the Mediterranean off southern France.

Something weird is up with La Nina, the natural but potent weather event linked to more drought and wildfires in the western United States and more Atlantic hurricanes. It's becoming the nation's unwanted weather guest and meteorologists said the West's megadrought won't go away until La Nina does.

The current double-dip La Nina set a record for strength last month and is forecast to likely be around for a rare but not quite unprecedented third straight winter. And it's not just this one. Scientists are noticing that in the past 25 years the world seems to be getting more La Ninas than it used to and that is just the opposite of what their best computer model simulations say should be happening with human-caused climate change.

Salah Chelab crushed a husk of wheat plucked from his sprawling farmland south of Baghdad and inspected its seeds in the palm of one hand. They were several grams lighter than he hoped.

"It's because of the water shortages," he said, the farm machine roaring behind him, cutting and gathering his year's wheat harvest.

The United Nations Environment Program (UNEP) Representative and Regional Director for West Asia, Sami Dimassi, together with the President of Nusaned, Ghaida Nawam, have signed an agreement to mark the start of their collaboration in implementing a series of pilot projects.

The agreement falls within the SwitchMed II initiative, funded by the European Union, aiming to provide support mechanisms to countries on the southern shores of the Mediterranean to switch to sustainable consumption and production patterns.

Hurricane Agatha, the season's first, headed for a stretch of tourist beaches and fishing towns on Mexico's southern Pacific coast Monday amid warnings of dangerous storm surge and flooding from heavy rains.

After forming on Sunday, Agatha quickly gained power, and it was predicted to make landfall as a powerful Category 3 hurricane Monday afternoon or evening, the U.S. National Hurricane Center said.