Fossil analysis adds to debate over how earliest known hominin walked
Sahelanthropus fossils (centre) compared with a chimpanzee (left) and a human (right) Wiliams et al., Sci. Adv. 12, eadv0130 A
Star that seemed to vanish more than 130 years ago is found again
An image captured by a telescope at the Grasslands Observatory in Arizona. The “x” is where E. E. Barnard saw
Mathematicians spent 2025 exploring the edge of mathematics
When numbers get large, things get weird Jezper / Alamy In 2025, the edges of mathematics came a little more
Physicists used ‘dark photons’ in an effort to rewrite physics in 2025
Dark photons offer a new explanation for the double-slit experiment RUSSELL KIGHTLEY/SCIENCE PHOTO LIBRARY A core tenet of quantum theory
Putting data centres in space isn’t going to happen any time soon
Starcloud wants to build a data centre satellite that is 4 kilometres by 4 kilometres Starcloud Could AI’s insatiable thirst
Roman soldiers defending Hadrian’s Wall had intestinal parasites
3rd-century baths and latrine block at Vindolanda, the Roman fort close to Hadrian’s Wall in the UK Vindolanda Trust Despite
The world will soon be losing 3000 glaciers every year
Meltwater runs through a glacier cave at the front of Morteratsch glacier in Switzerland Lander Van Tricht About 1000 glaciers
Some Arctic warming ‘irreversible’ even if we cut atmospheric CO2
A glacier meets the sea in Dickson Fjord, Greenland Jane Rix/Alamy The Arctic will retain about 1.5°C of warming even
Dinosaurs like Diplodocus may have been as colourful as birds
Illustration of a sauropod, with inset showing pigmented structures in the skin as seen with an electron microscope Tess Gallagher
Comet 3I/ATLAS from beyond solar system carries key molecule for life
Comet 3I/ATLAS is only the third known visitor to our solar system from elsewhere International Gemini Observatory/NOIRLab/NSF/AURA/Shadow the Scientist; J.