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By Issy Ronald, CNN (CNN) — Blushing was once thought to be the “most peculiar and most human of all expressions,” as Charles Darwin put it, but a new study has found that hens share this peculiarity and can also express their fear or excitement in this way. “Our research shows that domestic chickens are

By Ashley Strickland, CNN (CNN) — A glowing supernova remnant, a nebula shaped like a cat’s paw and the iconic “Pillars of Creation” are just a few of the celestial objects that shine in 25 never-before-seen images captured by NASA’s Chandra X-ray Observatory to mark the telescope’s 25th anniversary. Chandra, named in honor of the

By Ella Nilsen, CNN (CNN) — Environmental Protection Agency administrator Michael Regan is bullish on his agency’s prospects against the harshest headwinds in its history, as Republicans, anti-climate industry and an ultra-conservative Supreme Court take aim at its core mission. “I feel extremely confident in the product we put out,” Regan told CNN in an

By Jack Guy, CNN London (CNN) — Komodo dragons, the world’s largest species of lizard, have iron-tipped teeth that help them to rip their prey apart, according to new research. The metal is concentrated in the cutting edge and tips of their curved, serrated teeth, staining them orange, scientists wrote in a paper published Wednesday

By Jackie Wattles, CNN (CNN) — Rare footage captured by a camera strapped to the back of an endangered shark shows the jarring moment it was struck by a boat — prompting the animal to dash into deep waters and rest for hours. It’s not clear whether the massive 23-foot (7-meter) animal, known as a

By Ella Nilsen, CNN (CNN) — As Vice President Kamala Harris marches toward the Democratic nomination, climate advocates like what they see. Even before he’s finished his term, President Joe Biden made his stamp as the most pro-climate president in history. And Harris is an exciting climate candidate in her own right, multiple advocates told

By Jack Guy, CNN (CNN) — Sharks living off the coast of Brazil have tested positive for cocaine, according to new research, the first time that the drug has been detected in free-ranging sharks. Scientists tested 13 Brazilian sharpnose sharks in the waters off the city of Rio de Janeiro and found cocaine present in

By Laura Paddison and Chris Liakos, CNN (CNN) — The Greek Islands, known for their idyllic towns, rugged landscapes and sun-baked beaches, are in the grip of a serious crisis. Many are running alarmingly low on water — a problem set to get worse as the tourist season hits full flow and hot dry weather

By Katie Hunt, CNN (CNN) — A mysterious phenomenon first observed in 2013 aboard a vessel in a remote part of the Pacific Ocean appeared so preposterous, it convinced ocean scientist Andrew Sweetman that his monitoring equipment was faulty. Sensor readings seemed to show that oxygen was being made on the seabed 4,000 meters (about

By Ella Nilsen, CNN (CNN) — The massive offshore wind turbine blade that broke and spread fiberglass and foam debris across Nantucket beaches this week was one of several recent failures of blades made by GE Vernova – a top US wind turbine manufacturer. Several GE Vernova blades have broken on onshore and offshore turbines

By Ashley Strickland, CNN (CNN) — As the full moon shines in the night sky this weekend, take a moment to revel in its beauty and search for a large, dark plain. The surface feature is Mare Tranquillitatis, or the Sea of Tranquility, where the Apollo 11 mission landed on the afternoon of July 20,

By Ashley Strickland, CNN (CNN) — The Curiosity rover has made its most unusual find to date on Mars: rocks made of pure sulfur. And it all began when the 1-ton rover happened to drive over a rock and crack it open, revealing yellowish-green crystals never spotted before on the red planet. “I think it’s

By Taylor Nicioli, CNN (CNN) — July’s full moon will shine bright in the sky this weekend — and lands near the anniversary of a special lunar event worth celebrating. The full moon — nicknamed the buck moon — will peak at 6:17 a.m. ET Sunday, according to The Old Farmer’s Almanac. It’s called the buck

By Ella Nilsen, CNN (CNN) — Debris from a broken offshore wind turbine has for days been washing up on the Nantucket shore, prompting beach closures and frustrating locals at the peak of the summer season. The massive turbine blade – as long as a football field – was part of the Vineyard Wind farm

By Sharon Braithwaite and Sophie Tanno, CNN (CNN) — Five activists of the Just Stop Oil environmental campaign have been handed prison sentences for their involvement in organizing protests that blocked a major London highway in 2022, PA media reported, sparking a wave of criticism from climate advocates. ‘Just Stop Oil’ co-founder Roger Hallam, 58,

By Catherine Nicholls, CNN (CNN) — A Stegosaurus skeleton has become the most valuable fossil ever sold at auction, being snapped up for $44.6 million in New York. The dinosaur fossil was sold on Wednesday to an anonymous buyer after it was sought after by seven bidders, according to Sotheby’s, the auction house handling the

By Taylor Nicioli, CNN (CNN) — A meteor bright enough to be spotted in broad daylight streaked across the sky on Tuesday morning, catching the attention of several East Coasters who documented their sightings. The fireball, defined as a meteor brighter than the planet Venus, is estimated to have soared over New York City before traversing

By Ashley Strickland, CNN (CNN) — Astronomers have detected an exoplanet with a highly oblong orbit that experiences wild temperature swings — and it may be transitioning into another type of world. The exoplanet, named TIC 241249530 b, orbits a star about 1,100 light-years from Earth. The star is one of a binary pair, so