Scientists have identified supermagnetic macrophages in the livers of homing pigeons (Columba livia domestica) that appear essential for navigation when the Sun is not visible, pointing to an entirely new mechanism for animal magnetoreception.
Com o prazo das candidaturas para o Cheque Formação+Digital a terminar, reunimos uma seleção com 6 cursos de curta duração que ainda podem ser concluídos a tempo de beneficiar do apoio.
In a small randomized trial in the United Kingdom, adults who added a serving of 100% fruit juice or a smoothie to a healthier diet reported lower depression scores after four weeks.
Bilhetes falsos, lojas fraudulentas, phishing temático e até kits de fraude associados ao Mundial FIFA 2026 estão à venda na dark web. As empresas de cibersegurança revelam as principais ameaças e pedem cuidados redobrados.
AI-generated images are widespread on social media. Starting in August 2026, platforms will be required under the EU AI Act to label certain types of such content. A study by CISPA researcher Sandra Höltervennhoff investigates how users perceive these so-called AI labels and how they influence the credibility of information.
An anonymous reader quotes a report from Ars Technica: Authorities in the Netherlands said they dismantled a botnet that comprised more than 17 million devices and were managed by 200 servers in a joint operation by the police and the National Cyber Security Center. The action, announced Thursday, came about after a security researcher reported the sprawling network to authorities. The host infrastructure was located in the Netherlands. "The police then seized several botnet servers from a hosting provider for investigation," the NCSC said. "The botnet was taken offline by the provider because it was used for criminal purposes."
According to a report Thursday by the NL Times, the botnet was linked to ASOCKS, a Russia-based company that provides residential proxy services. These services cater to people and organizations who want to obscure their locations or identities by proxying their Internet traffic through third-party devices. Proxy services are often used for illicit or unethical purposes such as performing DDoS attacks, running botnet command-and-control servers, operating phishing operations, and scraping website content. [...] It's unclear how the 17 million devices controlled by the botnet taken down by the Dutch police came to be that way.
Tech industry layoffs are accelerating, and executives have been quick to say it’s because their companies are doing more with artificial intelligence, even when there may be more to it.
Box, a Silicon Valley software maker, expects to have more employees, not fewer, as it hires A.I. architects, A.I. solutions managers and other new A.I.-related positions.
Cristiano Amon, CEO da Qualcomm, subiu ao palco da Computex para apresentar a visão da marca para um mundo onde o agente de IA não está preso a um dispositivo. Trouxe consigo chips para todos os bolsos, desde portáteis de baixo custo à robótica.
"Around 570 cables (plus a further 80 planned) carry between 95% and 99% of the world's intercontinental telecommunications data," reports CNN (since fiber cables offer speeds of terabits per second, carry much more data than satellite links). And "networks of green energy cables carrying electricity are also starting to sprawl across the world's seabeds."
Now to protect them, the U.S., Australia and the U.K. "are planning to develop new unmanned undersea vehicles" as part of their trilateral security partnership.
Western governments see a growing risk of Russian and Chinese sabotage of undersea cables and are also concerned that Iran may seek to exploit the many data networks running through the shallow waters of the Persian Gulf. The "seabed is a battlefield" said Australia's Defence Minister, Richard Marles, in Singapore, calling for tougher action against so-called shadow-fleet vessels... The programme will improve the three nations' reconnaissance and strike capabilities, "and bolster superiority in anti-submarine and anti-surface warfare," as well as mine countermeasures, [according to a statement from their trilateral AUKUS partnership]... The new AUKUS project will sharpen all three countries' ability to respond to threats, including those targeting underwater cables and pipelines, through a range of "cutting edge sensors and weapons systems for undersea drones," UK Defence Secretary John Healey said.
Marles said undersea internet cables — "the arteries of modern civilization" — were being cut at an unprecedented rate, with island nations like Australia acutely vulnerable. "Over the past 18 months, we have witnessed a series of attacks against subsea critical infrastructure at a scale and frequency that is historically unprecedented," he said. The UK government has also highlighted the vulnerability of the world's digital highways. "Every international payment, every cross-border trade executed in milliseconds, every flow of data between businesses here in the UK and markets overseas — all travel along the seabed," Telecoms Minister Liz Lloyd said Friday... Last month, the UK said it had tracked three Russian submarines covertly surveying undersea cables in the north Atlantic... A UK parliamentary inquiry warned last year that UK infrastructure might be targeted in a crisis, adding it was "not confident that the UK could prevent such attacks or recover within an acceptable time period."
The UK Navy is already exploring the creation of a hybrid force that incorporates the widespread use of underwater drones to combat Russian threats in the Atlantic.
For a few select evenings in the late spring and early summer, sunlight aligns with Manhattan’s grid. The city’s bustling streets are washed with golden light as the sun sets, while tourists and locals alike flood the streets to snap that perfect picture. This event is nicknamed Manhattanhenge and it will begin on May 28 and continue through July 12.
However, you don’t need to live in the Big Apple to see a “henge” like Manhattanhenge. They actually pop up in a few places and a website called Hengefinder can help you find the closest henge.
Meet Hedgefinder
Data scientist and engineer Victoria Ritvo created the website, while software engineer John Pribyl built the accompanying app. Ritvo wrote about creating Hedgefinder in her blog, and details the three basic steps that scientists can use to find a henge. First, find the angle of the road, or its bearing relative to true north. Second, find the angle of the sun at sunset, or its azimuth. Third, find the dates when those two angles match.
While you don’t have to do any of that high-level math, you can read about how Rivoto and Pribyl made their calculations. You simply put in an address or city and can get a calculation for the closet henge near you.
“Having Hengefinder active means henges are now explorable outside of Manhattan, and I’ve been searching for them using the app,” Ritvo writes. “My favorite one so far, I haven’t actually seen. I’m intrigued by the Haarlemmertrekvaart, a canal which traces the southern edge of Westerpark in Amsterdam.”
Interestingly, much of Europe is left out of henge mania due to medieval street design. Amsterdam’s famed canals do offer an option, where sunlight can reflect off of the water. Henges may have been occurring twice a year for the past 400 years on the Haarlemmertrekvaart.
How henges work
The sun does not set in the same place every day. Its position changes along the horizon with the seasons. While the angle does not usually match the directions of a street, it will on a few days each year if the street is angled correctly.
In 1997, the term Manhattanhenge was first coined by Neil deGrasse Tyson, an astrophysicist and director of the Hayden Planetarium at New York’s American Museum of Natural History. Tyson noted that the setting sun framed by Manhattan’s building was comparable to how the sun’s rays strike the center of England’s Stonehenge on the solstice. The Neolithic humans who built the stone circle in stages between 3100 BCE and 1600 BCE intended for the light to shine that way on the solstice. But the builders of Manhattan? Not so much.
Chicagohenge in Illinois and Baltimorehenge in Maryland both occur when the sunset lines up with the grid systems in those cities around the spring and fall equinoxes in March and September. In Canada, Torontohenge occurs in February and October.
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