共找到 20 条结果
The Trump administration, which took a noninterventionist approach to artificial intelligence, is now discussing imposing oversight on A。 models before they are made publicly available
Acoustic fire suppression goes commercial
Scientists have created a powerful new way to control quantum systems, achieving the first-ever demonstration of quadsqueezing—an elusive fourth-order quantum effect。 By combining simple forces in a clever way, they made previously hidden quantum behaviors visible and usable, opening new frontiers for quantum technology
Researchers have, for the first time, directly visualized how electronic patterns known as charge density waves evolve across a phase transition。 Using cutting-edge microscopy, they found these patterns form unevenly, breaking into patches influenced by tiny structural distortions。 Unexpectedly, small pockets of order persist even above the transit
For the first time, scientists have watched a subduction zone literally fall apart beneath the ocean floor。 Using advanced seismic imaging, they found the Juan de Fuca plate splitting into fragments as it sinks beneath North America。 Rather than collapsing all at once, the plate is tearing piece by piece, like a train slowly derailing
Scientists have uncovered the true boundary of the Milky Way’s star-forming region using stellar “age mapping。” They found a telltale U-shaped pattern showing that star formation drops sharply around 35,000–40,000 light-years from the center。 Beyond that, stars are mostly migrants, slowly drifting outward rather than forming in place
A major review of 217 trials shows that aerobic exercise is the most effective option for managing knee osteoarthritis。 Activities like walking, cycling, and swimming outperformed other exercise types in reducing pain and improving movement。 While alternatives like strength training and mind-body exercises help, they are best used alongside aerobic
A group of undergraduate students pulled off something remarkable: they built their own dark matter detector and used it to probe one of physics’ biggest mysteries。 Working with limited resources but plenty of creativity, they designed a stripped-down experiment to hunt for axions — hypothetical particles that could make up dark matter
A centuries-old vision of a mechanical volcano has finally erupted into reality, as two University of Melbourne engineering students recreated a design first imagined in 1775 by volcanology enthusiast Sir William Hamilton。 Drawing from an 18th-century watercolor and a preserved sketch, they used modern tools like LED lighting and electronic systems
A bizarre rainforest insect is rewriting what scientists thought they knew about camouflage。 A katydid spotted glowing hot pink in Panama stunned researchers when it slowly transformed into green in just 11 days, perfectly mirroring the life cycle of tropical leaves that emerge pink before maturing。 What once seemed like a rare genetic oddity now a
In the chaotic first moments after the Big Bang, ripples in spacetime may have done more than just echo through the cosmos—they could have helped create dark matter itself。 New research suggests that faint, ancient gravitational waves might have transformed into particles that eventually became the invisible substance shaping galaxies today
Evolution seems to follow a script more often than expected。 Researchers found that distantly related butterflies and moths have reused the same pair of genes for over 120 million years to produce strikingly similar warning colors。 Rather than altering the genes themselves, evolution modifies how they’re switched on and off
Australia’s famous Twelve Apostles didn’t just erode into existence—they were slowly pushed up from the ocean floor by powerful tectonic forces over millions of years, new research reveals。 Scientists discovered that these towering limestone stacks act like a natural time capsule, preserving clues about ancient climates, sea levels, and even life f
Scientists have discovered unexpected water-ice clouds on a distant, Jupiter-like exoplanet, challenging current atmospheric models。 By directly imaging Epsilon Indi Ab with the James Webb Space Telescope, they found less ammonia than expected—likely hidden by thick, patchy clouds。 The finding reveals new layers of complexity in giant planets and s
A mysterious cosmic explosion has astronomers buzzing, as a strange event may hint at an entirely new kind of stellar cataclysm。 After detecting ripples in space-time, scientists spotted a fast-fading red glow that initially looked like a rare kilonova—the kind of collision that forges gold and uranium。 But just days later, the signal shifted, beha
Scientists have created tiny “optical tornadoes” — swirling beams of light that twist like miniature whirlwinds — using a surprisingly simple setup based on liquid crystals。 Instead of relying on complex nanotechnology, the team used self-organizing structures called torons to trap and manipulate light, causing it to spiral and rotate in intricate