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By Issy Ronald, CNN (CNN) — For humans, flashing a smile is an easy way to avoid misunderstanding. And, according to a new study, bottlenose dolphins may use a similar tactic while playing with each other. The study, which was published Wednesday in the journal iScience, found that dolphins make an open-mouthed expression, comparable to

By Jackie Wattles and Ashley Strickland, CNN (CNN) — If snapshots of the dazzling “ring of fire” that danced across the skies of South America on Wednesday sparked eclipse fever, sky-gazers won’t have to wait too long for additional celestial spectacles in store for next year. While there won’t be another “ring of fire” event until 2026,

By Jack Guy, CNN (CNN) — The wreck of a US Navy destroyer known as the “Ghost Ship of the Pacific” has been found off the coast of California by undersea investigators. The USS Stewart was deliberately sunk during a US Navy exercise in May 1946 and its final resting place has now been located,

By Katie Hunt, CNN (CNN) — Botanists have grown a long-lost tree species from a 1,000-year-old seed found in a cave in the Judean Desert in the 1980s. The researchers involved in the project say they believe the tree species, which is thought to be extinct today, could have been the source of a healing

By Amy Gunia and Alkira Reinfrank, CNN (CNN) — Apollo mission astronauts who visited the moon between 1969 and 1972 found a hopping motion useful for navigating its surface, where the gravity is one-sixth of Earth’s. Today, robots are playing a leading role in space exploration, and some are taking cues from those bunny-hopping astronauts.

By Jackie Wattles, CNN (CNN) — The NASA team overseeing the iconic Voyager 2 spacecraft made the decision to power down one of its science instruments in an effort to conserve energy. The probe is currently soaring through space some 13 billion miles (20.9 billion kilometers) from Earth. Mission engineers sent a command to shutter

By Laura Paddison and Holly Yan, CNN (CNN) — Asheville was touted as a climate haven, a place to escape the worst ravages of extreme weather. But Hurricane Helene’s deadly path of destruction reveals this North Carolina city, like any in America, was never safe — it’s just that memories are short and the reach

By Jack Guy, CNN London (CNN) — A medallion containing some of the original mold involved in the discovery of penicillin is expected to fetch up to $50,000 when it goes up for auction later this month. The medallion was created and inscribed by Scottish bacteriologist Alexander Fleming in the course of “one of the

By Ashley Strickland, CNN (CNN) — A solar eclipse event will create a “ring of fire” in the skies over parts of South America on Wednesday, according to NASA. Annular solar eclipses occur when the moon passes between Earth and the sun when the moon is near or at the farthest point in its orbit

By Lianne Kolirin, CNN (CNN) — Archaeologists in Denmark have unearthed more than 50 “exceptionally well preserved” skeletons in a large Viking-era burial ground in the east of the country. A team from Museum Odense have spent the last six months excavating the Åsum site, which covers about 21,500 square feet and is thought to date

By Laura Paddison, CNN (CNN) — Part of the border between Italy and Switzerland is set to be redrawn as the glaciers that mark the boundary melt, in yet another sign of how much humans are changing the world by burning planet-heating fossil fuels.. The two countries have agreed to change the border under the

Story by Associated Press (CNN) — Britain’s last coal-fired power plant will close on Monday, ending 142 years of coal-generated electricity in the nation that sparked the Industrial Revolution. The Ratcliffe-on-Soar station in central England is to finish its final shift at midnight, after more than half a century of turning coal into power. Owner Uniper says

By Laura Paddison and Gianluca Mezzofiore, CNN (CNN) — Huge tributaries that feed the mighty Amazon River — the largest on the planet — have plunged to record-low levels, upending lives, stranding boats, and threatening endangered dolphins as drought grips Brazil. The country is currently enduring its worst drought since records began in 1950, according

By Ashley Strickland, CNN (CNN) — Today, the lush, green valley surrounding the Tollense River in northeast Germany appears to be a serene place to appreciate nature. But to archaeologists, the Tollense Valley is considered Europe’s oldest battlefield. An amateur archaeologist first spotted a bone sticking out of the riverbank in 1996. A series of

By Jackie Wattles, CNN (CNN) — A SpaceX mission due to unite the Boeing Starliner astronauts with the spacecraft that will bring them home has taken flight. NASA’s Suni Williams and Butch Wilmore have now been on the International Space Station more than 100 days longer than expected. The SpaceX mission, called Crew-9, took off