A comprehensive new report released by the UN is warning that the world’s oceans are in danger, currently facing a scourge of unnatural warming, rising, acidifying, and deoxygenating. Covering over 361 million square kilometers (139 million square miles), the oceans sprawl over 71 percent of the Earth’s surface, and itsread more

A massive impact crater the size of the city of Paris has been discovered under the ice sheet in northern Greenland. Partially hidden under the Hiawatha Glacier, this 31-kilometer (19.3-mile) crater is estimated to be no older than three million years, but the researchers believe that it was formed much more recently, possibly as late as 12,000 years ago, making it the largest impact crater of its kind on Earth.

Two new studies on the health of ocean currents in the North Atlantic have found that a natural decrease in the flow of these currents that began in the mid-nineteenth century has been exacerbated by modern-day climate change, resulting in the weakest the North Atlantic’s currents have been in over 1,500 years.