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Alien-like signal from 2023 has been decoded. The next step is to figure out what it means

By Taylor Nicioli, CNN (CNN) — If Earth’s astronomical observatories were to pick up a signal from outer space, it would require an all-hands-on-deck effort to untangle and decipher the extraterrestrial message. An art project from the SETI Institute, a nonprofit in Mountain View, California, devoted to searching for life beyond Earth, simulated that scenario

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As Trump’s win tests the world order, diplomats are fretting over what it means for the planet

By Angela Dewan and Ella Nilsen, CNN (CNN) — America’s allies and foes alike have spent the past five days speculating about what Donald Trump’s re-election will mean for their economies, security and the world’s grinding wars. Similar anxieties are brewing among diplomats gathering in Azerbaijan’s capital, Baku, on Monday for the COP29 climate talks

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A map shows the countries in North America and South America (in gray) where terror bird fossils have been found. Colored dots indicate the locations of fossil sites.

Ancient ‘terror birds’ were giant apex predators. Suspected new species is among the largest ever known

By Mindy Weisberger, CNN (CNN) — Millions of years ago, long-legged, big-beaked, meat-eating “terror birds” stalked the Americas. The imposing creatures ruled the roost as top predators of their terrestrial ecosystems, and scientists recently discovered one of the largest terror birds ever unearthed. When paleontologists analyzed a leg bone from a fossil site in Colombia

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Hours after Trump’s election, Biden moved to limit oil drilling in Arctic National Wildlife Refuge

By Ella Nilsen, CNN (CNN) — Hours after former President Donald Trump was declared the winner of the 2024 election, the Biden administration moved Wednesday to limit oil drilling in Alaska’s Arctic National Wildlife Refuge. Oil drilling had been banned for decades in the Arctic refuge — a pristine natural region in northeast Alaska home

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World’s oldest writing system may have its origins in mysterious, undeciphered symbols

By Ashley Strickland, CNN (CNN) — Researchers have uncovered links between the precursor to the world’s oldest writing system and the mysterious, intricate designs left behind by engraved cylindrical seals that were rolled across clay tablets about 6,000 years ago. Scholars consider cuneiform the first writing system, and humans used its wedge-shaped characters to inscribe

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Lost Maya city discovered in Mexico

By Mindy Weisberger, CNN (CNN) — For more than 1,000 years, dense forests in the Mexican state of Campeche concealed the region’s ancient human history. Scientists called Campeche an archaeological “blank spot” in the Maya Lowlands, an area spanning what is now Belize, El Salvador, Guatemala and southeastern Mexico, and which the Maya inhabited from

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Record-breaking prime number containing more than 41 million digits found by former Nvidia programmer

By Julianna Bragg, CNN (CNN) — For many people, prime numbers have faded into the background since distant grade school days. However, for Luke Durant, a 36-year-old former Nvidia programmer, prime numbers became an all-consuming passion. He devoted nearly one year and invested a considerable sum of his own money to uncover the world’s largest

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