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Can AI Grade University Essays Accurately? New Study Finds Marks Drift Toward the Middle
A Cardiff-led study found ChatGPT could not reliably reproduce human essay marks—and tended to pull both strong and weak work toward the middle.
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Does Remote Work Make People Work While Sick? Why Presenteeism Is Changing
New research argues that remote and hybrid work have created new forms of presenteeism—from full sick-day schedules at home to checking only urgent messages.
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How Does GRETA See Inside Atomic Nuclei? The World’s Most Advanced Gamma-Ray Detector Starts Science
GRETA—the Gamma-Ray Energy Tracking Array—uses a shell of high-purity germanium detectors to reconstruct gamma rays emitted by unstable atomic nuclei. After completing commissioning at the Facility for Rare Isotope Beams in Michigan, the $58 million instrument has begun its first scientific experiments. The opening experiment is led by nuclear physicists from the University of Surrey.…
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Can Dust and Water Survive Near the Milky Way’s Black Hole? Webb Finds They Can
Yes. New James Webb Space Telescope observations show that silicate dust and water can form or survive in the envelope of an ageing star only about 0.55 light-years from Sagittarius A*, the supermassive black hole at the centre of the Milky Way. The finding comes from a detailed infrared study of IRS 3, one of…
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What Is the Doves Type? The Printing Letters Recovered from the Thames Are Being Used Again
The Doves Type is a celebrated metal typeface created for the Doves Press in London around 1900. Its co-creator, Thomas Cobden-Sanderson, later threw the type into the River Thames to stop his former business partner from inheriting it. After more than a century underwater, recovered pieces have now been used to print a book again.…
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What Was Leolepis? The Tiny Armoured Fish From Before Earth’s Biggest Extinction
Leolepis matogrossensis is a newly described 254-million-year-old ray-finned fish from Brazil. It was only about 15 centimetres long, carried tooth-like armour and lived beside a vast Permian lake shortly before the largest mass extinction in Earth’s history. The fossil is unusually complete for a South American fish of its age. It was found in reddish…