A robot army is heading to Greenland for a mission scientists once thought was impossible |

Some of the world’s most advanced robots are preparing for an extraordinary expedition to one of the planet’s most dangerous environments. Beginning this July, a fleet of autonomous drones, robotic boats, underwater vehicles and intelligent sensors will travel to Greenland to investigate how its glaciers are melting where they meet the ocean. The mission, known…

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Where did the universe’s oldest star clusters come from? A new study has an answer |

For decades, astronomers have searched for the birthplace of globular clusters, the dense spherical collections of stars that orbit galaxies today. These ancient systems are among the oldest visible structures in the Universe, yet their earliest history remains surprisingly difficult to reconstruct. Most theories have focused on crowded regions inside young galaxies, where gas was…

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Australia generates so much solar power that it is giving away free electricity to households for 3 hours |

Australia’s renewable energy boom has reached a remarkable milestone. The country now generates so much electricity from rooftop solar panels that, during the middle of the day, wholesale power prices frequently fall to zero or even below zero. Instead of allowing surplus electricity to go to waste, eligible households in parts of Australia can now…

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Scientists named this ancient galaxy CR7 after Cristiano Ronaldo, but its real significance lies 13 billion years in the past |

Football has a habit of borrowing the language of space. Players become stars, matches are described as astronomical, and careers are measured by how brightly they shine. Every so often, though, the comparison drifts into something more literal. More than a decade ago, astronomers studying one of the earliest known galaxies in the universe chose…

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A 1,700-year-old inscription found at a Mithras temple mentions Jesus Christ and may show how Christianity overtook a mysterious Roman cult

Archaeologists have deciphered a 1,700-year-old inscription at an ancient Roman temple in Turkey that offers rare written evidence of the shift from Mithraism to Christianity during the Roman period.The inscription was found at an underground Temple of Mithras inside Zerzevan Castle, a Roman fortification about 40 miles from the Syrian border. It was written in…

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Scientists tried to thicken Arctic ice by pumping seawater onto it. The ice did become thicker and brighter, but there is a big catch

Sea ice melts on the Franklin Starait (AP file photo) Scientists have tested an idea that could help reduce the melting of Arctic sea ice, and the initial results are promising. The method involves spraying of seawater onto existing sea ice in winter and letting it freeze into a new layer.The on-site experiment took place…

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What will happen on 13 April 2029: A giant asteroid will pass closer than some satellites and be visible to billions |

For most people, asteroids are distant objects that remain hidden behind telescope lenses and scientific instruments. That will briefly change in April 2029, when one of the best-known near-Earth asteroids is expected to become visible without specialist equipment across large parts of the world. The object, called Apophis, has attracted scientific attention for more than…

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