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By Andrew Freedman, Emma Tucker, Mary Gilbert, CNN (CNN) — The forces that descended upon the Guadalupe River in Texas’ Hill Country on Thursday night were a worst-case scenario. Four months’ worth of rain fell in just hours as water-laden thunderstorms stalled in place, giving rise to a wall of water that surged down the

By Katie Hunt, CNN (CNN) — Stone Age humans living by a lake in what’s now Germany systematically processed animal carcasses for fatty nutrients — essentially running what scientists describe as a “fat factory” to boil bones on a vast scale, according to new research. Archaeologists uncovered the factory by analyzing some 120,000 bone fragments

By Ashley Strickland, CNN (CNN) — A newly discovered object speeding through our solar system is sparking excitement among astronomers because it’s not from around here. Believed to be a comet, the object is only the third celestial body from beyond our solar system ever to be observed in our corner of the universe. This

By Ella Nilsen, Rene Marsh, CNN (CNN) — The Environmental Protection Agency has placed roughly 140 employees on administrative leave days after they signed a public letter expressing concern about the treatment of federal employees and the Trump administration’s regulations on climate and public health. The EPA is conducting an “administrative investigation” into the employees,

By Laura Paddison, Chris Liakos, CNN (CNN) — More than 200 firefighters are struggling to tackle an out-of-control wildfire on Crete — Greece’s largest island and a tourist hotspot — as authorities order mass evacuations. The fire broke out Wednesday afternoon near Ierapetra, a town on the island’s southeast coast, amid unusually high temperatures, 3

By Ella Nilsen, CNN (CNN) — The visitors who trek to America’s national parks are already noticing the changes, just months after President Donald Trump took office. “I’ve been visiting national parks for 30 years and never has the presence of rangers been so absent,” one visitor to Zion National Park wrote in National Parks

By Jack Guy, CNN (CNN) — A meteorite that is the largest known piece of Mars on Earth is expected to fetch up to $4 million. It’s up for auction at Sotheby’s. Known as NWA 16788, the meteorite weighs 54 pounds (24.5 kilograms), massive compared with most Martian meteorites, which tend to be small fragments,

By Laura Paddison, Mitchell McCluskey, CNN (CNN) — A brutal heat wave is gripping many parts of Europe, leaving millions of people struggling to adapt to punishing, record-breaking temperatures. Heat persists even at night, with temperatures in some places not dipping much below 90 degrees. There is little respite. Air conditioning is very rare in

By Laura Paddison, CNN (CNN) — Around 252 million years ago, life on Earth suffered its most catastrophic blow to date: a mass extinction event known as the “Great Dying” that wiped out around 90% of life. What followed has long puzzled scientists. The planet became lethally hot and remained so for 5 million years.

By Lianne Kolirin, CNN (CNN) — Crouched low in one of the coldest, remotest places on Earth, polar explorer Alan Chambers searched for an invisible threat. Traveling with fellow former Royal Marine Dave Thomas, he had spent two long months skiing 715 miles (1,151 kilometers) — completely unassisted — from the Hercules Inlet on the

By Andrew Freedman, CNN (CNN) — The Trump administration’s proposed budget seeks to shut down the laboratory atop a peak in Hawaii where scientists have gathered the most conclusive evidence of human-caused climate change since the 1950s. The Mauna Loa laboratory in Hawaii has measured atmospheric carbon dioxide, which — along with other planet-warming pollution

By Ella Nilsen, Matt Egan, CNN (CNN) — Business groups and clean-energy developers are apoplectic over a last-minute provision tucked into President Donald Trump’s spending bill that will tax the solar and wind industry, making it much harder to get new, cheap electricity onto the grid. Senate Republicans revealed an entirely new tax for renewable

By Jacopo Prisco, CNN (CNN) — Astronomers in Australia picked up a strange radio signal in June 2024 — one near our planet and so powerful that, for a moment, it outshined everything else in the sky. The ensuing search for its source has sparked new questions around the growing problem of debris in Earth’s

By Ashley Strickland, CNN (CNN) — Some of the most intriguing science fiction springs from eerie, real-life phenomena. Case in point, the mutant parasite in the video game series “The Last of Us.” Creators of the franchise, which includes a show on HBO, got the idea from a type of fungus that hijacks the brains

By Ella Nilsen, Soph Warnes, CNN (CNN) — Household energy bills will be higher over the next decade now that Republicans have passed their tax and spending bill, according to a new analysis. President Donald Trump and Republicans are phasing out tax credits that lower the cost to build wind and solar, which are now

By Katie Hunt, CNN (CNN) — A rocky outcrop in a remote corner of northern Quebec appears serene in its eerie isolation on the eastern shore of Canada’s Hudson Bay. But over the past two decades, this exposed remnant of ancient ocean floor, known as the Nuvvuagittuq Greenstone Belt, has been a heated scientific battleground

By Issy Ronald, CNN London (CNN) — Scientists have discovered a new species of dinosaur — one that was dog-sized and roamed what is now the United States around 150 million years ago alongside familiar dinosaurs like stegosaurus and diplodocus. The Enigmacursor mollyborthwickae, as researchers named it, was about the same size as a Labrador

CNN By Jackie Wattles, CNN (CNN) — A private astronaut mission that just took flight has exposed a new twist in a lingering — and potentially dangerous — issue at humanity’s most frequently visited destination in space. Axiom Space Mission 4, or Ax-4, lifted off from NASA’s Kennedy Space Center in Florida at 2:32 a.m.