A new hands-on project shows how to build a simple radio transmitter and receiver using common household items like aluminum foil.
The guide explains that radio signals remain central to daily technology, from car radios and cell towers to GPS, Wi-Fi, and Bluetooth connections. It notes the so-called Golden Age of Radio did not truly end in the 1950s because television and modern wireless services still rely on the same waves.
New warnings from researchers highlight how Wi-Fi technology could turn everyday routers into surveillance tools capable of identifying individuals.
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Ultrathin terahertz filters developed from an accidental spin-off may expand capabilities in satellites, medical scanners and future 6G networks.
Researchers using the DAMPE space telescope have identified a shared spectral softening in cosmic rays across multiple particle types. The pattern appears at a rigidity of about 15 teraelectron-volts for protons through iron nuclei. This finding, published in Nature, offers new insight into how these high-energy particles behave in the galaxy.
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Researchers from Kyoto University and Hiroshima University have created a new technique to identify W states, a complex form of quantum entanglement. The advance could support progress in quantum computing and communication.