Visibility was so poor that Zachary Klukkert could barely see his hand in front of his face as he carefully swished the muck away from the skull of an extinct giant ruffed lemur. He was 40 feet ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. In a Costa Rican ...

Scuba-diving water anoles create a breathing bubble hat to help them stay submerged for long periods of time. When you purchase through links on our site, we may earn an affiliate commission. Here’s ...