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Pairs of correlated or entangled photons are a foundational resource in quantum optics. They are most commonly produced through spontaneous parametric down-conversion (SPDC), a nonlinear optical process that typically relies on a stable, coherent laser to pump a nonlinear crystal. Because of this requirement, SPDC has long been viewed as impractical without laboratory-grade laser systems. […] The Marion County deputy was protected from more severe injuries by his ballistic vest after a suspect attacked him while he was getting out of his cruiser Go to Source Eighty years ago, Penn researchers J. Presper Eckert and John Mauchly launched the age of electronic computing by harnessing electrons to solve complex numerical problems with ENIAC, the world’s first general-purpose electronic computer. Today, that same architecture still underlies general computing, but electrons are beginning to show their limits. Because they carry a charge, they […] From the 38th Annual Candlelight Vigil to the Police Unity Tour and K-9 memorial service, agencies across the country honored officers and K-9s who made the ultimate sacrifice Go to Source The demolished motorbikes were among more than 5,700 seized in 2026; the vehicles were snatched for being unregistered, uninsured, or having fake or altered plates Go to Source After the success of Artemis II, longer space journeys are expected, raising new health and nutritional challenges for astronauts. Current space foods rely on dried, shelf-stable items. Go to Source When NASA scientists first observed a particular radio burst from the sun in August 2025, there was nothing unusual about it. But then the radio burst kept going. Typically, solar radio bursts like these last a few hours to days. But this one was different. By the time it was over, the radio burst had […] On Thursday, NASA issued a Request for Proposal (RFP), seeking industry collaboration for the Mars Telecommunications Network. Go to Source Maps can show more than just where things are—they can also show how things change. New maps of artificial light reveal a planet that has been reshaping its nights through patterns of brightening and dimming. Go to Source Researchers have developed a mathematical method that enables more precise calculations of the most economical travel routes between the orbits of celestial bodies. To demonstrate this method, they calculated a more efficient path between Earth’s and the moon’s orbits than any previously described in the scientific literature. The study is published in the journal Astrodynamics. […] Spain, one of the few places in the world where a total solar eclipse will be visible in August, has begun preparations for an event it hopes will shift tourism away from the beaches and toward the countryside. Go to Source We may be more in the dark about dark matter than previously thought, according to a new analysis of distant galaxy clusters. Yale astrophysicist Priyamvada Natarajan, a leading theorist on the nature of black holes and dark matter, says new observational data conflicts with certain assumptions about cold dark matter (CDM)—unseen, slow-moving particles that are […] An international team of researchers has developed new stellar and supernova models to explain the mysterious elemental abundance patterns left by billions of supernova explosions around the Perseus constellation, which have been difficult to explain with conventional theoretical models, reports three recent studies published in The Astrophysical Journal. Go to Source “I feel like I got the ship back on course from the least secure disastrous chaotic border to the most secure border this country has ever seen,” Michael Banks said Go to Source Near-infrared light is invisible to humans. And yet, under the right conditions, the human eye can perceive it. Researchers from Poland’s International Center for Translational Eye Research (ICTER) have now shown that the efficiency of this phenomenon depends not only on the laser pulse itself, but also on two highly specific factors: the beam diameter […] |
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