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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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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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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AI’s cooling crisis: Why future data centres in space may not need a single drop of water |

Artificial intelligence is driving an unprecedented surge in demand for computing power. Still, the data centres behind today’s most advanced AI models face a growing challenge: keeping millions of processors cool without consuming vast amounts of energy and water. On Earth, cooling systems can account for a significant share of a facility’s electricity use while…

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