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Sunt amintirile iluzii? Întrebarea pare filozofică, dar își găsește rădăcinile într-un paradox foarte concret din fizica statistică. Trei cercetători – profesorul David Wolpert, Carlo Rovelli, membru al Fractal Faculty (ambii la Santa Fe Institute, SUA), și fizicianul Jordan Scharnhorst, de la University of California, SUA – revin la ipoteza „creierului Boltzmann”, un experiment de gândire

În York, într-o hală înaltă ca o catedrală industrială, șinele par să lege secole între ele. Acolo, National Railway Museum, înființat în 1975, spune povestea lumii moderne prin trenuri. Este unul dintre cele mai vizitate muzee feroviare de pe glob și, după anvergura colecției – peste un milion de obiecte – unul dintre cele mai

Adult epaulette shark curled up amongst corals. Johnny Gaskell Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. Being pregnant and giving birth is hard work for any species—but epaulette sharks (Hemiscyllium ocellatum) might disagree.  These fish and a number of other species are known as “walking sharks” for their

Midway Atoll, one of the older formations in the Hawaiian Islands chain, provides nesting habitat for millions of seabirds, including Laysan albatross and black-footed albatross. David Patte/USFWS Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. While winter is raging in an unusually large swath of the United

Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. “By definition, invasive species are harmful in some regard,” says Jacob Barney, a professor of invasive plant ecology at Virginia Tech University. So when we eat them, he adds, “we turn that harm into something positive.” Although just how

Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. Hours before sunrise, society’s earliest larks begin their day. Tales of Apple’s Tim Cook attending to his email at 3:45 a.m., novelist Barbara Kingsolver writing furiously at 4 a.m., and Michelle Obama starting her gym workout at 4:30 a.m.

NASA’s James Webb Space Telescope’s 2024 NIRCam image shows protostar EC 53 circled. Researchers using new data from Webb’s MIRI proved that crystalline silicates form in the hottest part of the disk of gas and dust surrounding the star—and may be shot to the system’s edges. Credit: NASA, ESA, CSA, STScI, Klaus Pontoppidan (NASA-JPL), Joel

This article was produced by National Geographic Traveller (UK). Switzerland’s sporty mountain resorts have traditionally offered far more than just downhill skiing. In these long-settled local towns, getting from A to B in winter has often required ingenuity. In Arosa, a horse-drawn sleigh takes riders from railway station to hotel, while in the Engadine, the

Né en 1957, dans l'Ohio, Richard Sutton a été formé à l'université Stanford, où il obtient un Bachelor of Arts en psychologie en 1978, puis à l'université du Massachusetts, dont il ressort docteur en informatique en 1984. Il est à l'origine du développement de concepts fondamentaux comme le Temporal Difference learning et les méthodes de

Saignements, douleurs, test de grossesse positif... La patiente présentait tous les symptômes d'une grossesse extra-utérine, qui survient quand l'embryon se développe en dehors de l'utérus. Mais l'examen clinique et des examens d'imagerie médicale ont révélé la présence d'un cancer de l'ovaire rare. Son cas a été décrit dans la revue Oncoscience. Une masse solide détectée