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Aliens Can Detect Earth’s Airports From 200 Light-Years Away

gizmodo.com Ellyn Lapointe 2025-07-31 18:00:53

Humans might not know of any intelligent beings beyond Earth, but if they exist, they might already know about us. New research shows that radar systems at commercial and military airports are inadvertently announcing our presence to any aliens with the ability to listen. Preliminary results from a study led by Ramiro Caisse Saide, an astrophysics PhD candidate at the University of Manchester, suggest extraterrestrials up to 200 light-years away could theoretically detect electromagnetic signal

Topics: away light radar signals years
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When Did Nature Burst into Vivid Color?

news.ycombinator.com Molly Herring 2025-08-16 11:09:09

In the animal kingdom, there is incredible variation in visual perception. What an animal sees depends on the structure of its retina and its neural visual processing system. Most insects can see ultraviolet, blue and green light, but there is wide variety among arthropods; mantis shrimp eyes have up to 12 different channels of color, revealing the ultraviolet spectrum and polarized light. The ancestor of living vertebrates could likely detect red, purple, blue and green — an ability that was ma

Topics: color evolutionary said signals vision
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Cell Towers Can Double as Cheap Radar Systems for Ports and Harbors (2014)

news.ycombinator.com Ian Chant 2025-08-23 11:48:12

How do you see ships without a pricey radar system? The question has troubled seaports around the world as they work to improve security. Without radar installations, it can be hard for port employees to detect small ships like those employed by pirates or by the terrorists who attacked the USS Cole in 2000. A team of researchers in Germany can now offer security teams a new option, though: putting existing cellular towers to work as quick and dirty radar systems. Developed at the Fraunhofer In

Topics: cell objects pcl radar signals
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Creative Commons debuts CC signals, a framework for an open AI ecosystem

techcrunch.com Sarah Perez 2025-08-28 22:02:42

Nonprofit Creative Commons, which spearheaded the licensing movement that allows creators to share their works while retaining copyright, is now preparing for the AI era. On Wednesday, the organization announced the launch of a new project, CC signals, which will allow dataset holders to detail how their content can or cannot be reused by machines, as in the case of training AI models. The idea is meant to create a balance between the open nature of the internet and the demand for ever more dat

Topics: ai cc creative data signals
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You sound like ChatGPT

theverge.com Sara Parker 2025-09-05 10:00:00

Join any Zoom call, walk into any lecture hall, or watch any YouTube video, and listen carefully. Past the content and inside the linguistic patterns, you’ll find the creeping uniformity of AI voice. Words like “prowess” and “tapestry,” which are favored by ChatGPT, are creeping into our vocabulary, while words like “bolster,” “unearth,” and “nuance,” words less favored by ChatGPT, have declined in use. Researchers are already documenting shifts in the way we speak and communicate as a result of

Topics: ai chatgpt human like signals
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Scientists in Antarctica Detect Deep-Earth Signals That Defy Known Physics

gizmodo.com Ellyn Lapointe 2025-09-14 06:35:49

A balloon-borne experiment over Antarctica, designed to detect cosmic radio waves, has instead picked up bizarre signals that appear to be coming from deep within the ice. These signals challenge our current understanding of particle physics, scientists say. The Antarctic Impulsive Transient Antenna (ANITA) experiment consists of radio antennas flown on NASA balloons 19 to 24 miles (30 to 39 kilometers) over the surface of Antarctica. In recent years, the detector has recorded radio pulses that

Topics: anita ice neutrinos radio signals
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Radio pulses detected coming from ice in Antarctica

news.ycombinator.com Unknown 2025-09-15 17:30:47

Once detected and traced to their source, these particles can reveal more about cosmic events than even the most high-powered telescopes, Wissel added, as the particles can travel undisturbed and almost as fast as the speed of light, giving clues about cosmic events that happened lightyears away. Wissel and teams of researchers around the world have been working to design and build special detectors to capture sensitive neutrino signals, even in relatively small amounts. Even one small signal f

Topics: detectors ice said signals wissel
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