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Phys.org · 实时热榜

HISTORY2026年7月30日124 不同热搜
07/2308/21 有历史数据
DAILY UNIQUE TOPICS124 个热搜
  1. 01
    A mechanically tunable molecular switch for circularly polarized light emission

    Over the past few decades, scientists have become increasingly interested in developing materials that do not simply withstand mechanical forces but instead respond to them in useful, detectable ways. For example, it is now possible to engineer materials that signal when they are under stress through changes in color or brightness. This growing domain, sometimes called mechanochromic or mechanoresponsive materials science, has found applications in structural sensors and advanced optical technol

    最高第 105:25 达到05:25 首次观测上榜20:53 观测离榜累计约15小时28分
  2. 02
    Climate shapes vegetation patterns across Yellow River Basin

    Climate drives vegetation patterns across the Henan section of China's Yellow River Basin, research in the International Journal of Environmental Engineering shows. However, expanding agriculture and urbanization have a detrimental effect on plant diversity in heavily developed areas, according to the study. The findings are based on satellite observations and ecological modeling of the region.

    最高第 105:41 达到05:41 首次观测上榜21:09 观测离榜累计约15小时28分
  3. 03
    Invasive species emerge as a driver of human displacement, new research shows

    Invasive alien species are driving human displacement, according to a new research paper published this month in Frontiers. In Kenya, Opuntia stricta has displaced pastoralist communities, while the invasive little fire ant has led to farm abandonment in New Caledonia, the Galápagos Islands and French Polynesia. Water hyacinth has disrupted fishing livelihoods in much of Africa.

    最高第 206:45 达到06:45 首次观测上榜22:13 观测离榜累计约15小时28分
  4. 04
    Expressway restoration may speed regional economic recovery after disasters

    A research team has, for the first time, demonstrated the crucial role that restoring transportation networks (such as roads and railways) plays in rebuilding regional economies and helping residents recover their livelihoods after a major disaster. The study was published in Transportation Research Part A: Policy and Practice.

    最高第 207:01 达到07:01 首次观测上榜22:29 观测离榜累计约15小时28分
  5. 05
    One of industry's toughest lignin byproducts could become feedstock for valuable chemicals

    The pulp and paper industry, which manufactures everything from tissue paper to cardboard, also generates a significant yet often overlooked byproduct—a complex polymer called lignin. Around 100 million tons of lignin are produced each year. Despite being the largest natural source of aromatic carbon on the planet, most of it is burned for energy. This is due to its complex structure, which is notoriously difficult to process. Researchers are exploring ways to leverage industrial lignin by devel

    最高第 106:45 达到06:45 首次观测上榜22:13 观测离榜累计约15小时28分
  6. 06
    Lake ice loss could accelerate after winter temperatures cross critical thresholds

    For lakes across the Northern Hemisphere, winter ice is more than a frozen surface. It is a seasonal regulator that shapes underwater ecosystems and energy balance. But as the planet warms, this frozen season is disappearing faster than expected.

    最高第 107:01 达到07:01 首次观测上榜22:29 观测离榜累计约15小时28分
  7. 07
    The role of community energy in mediating the sustainable energy transition

    Community energy projects, actively governed and managed by community members, play an essential role in advancing just energy transitions, for example, by providing energy in remote areas, facilitating the adoption of renewable technologies and building resilient electricity networks. However, their adoption remains limited. How does community energy work in practice, and how can it become more widespread?

    最高第 108:05 达到08:05 首次观测上榜23:33 观测离榜累计约15小时28分
  8. 08
    Ice Age artists carved thumbnail-size bird figurines from mammoth ivory 40,000 years ago

    Excavations at Hohle Fels Cave in the UNESCO World Heritage area of the Swabian Jura in southwestern Germany have again yielded two spectacular 40,000-year-old depictions of birds carved from mammoth ivory. The two figurines are the smallest discovered so far and are the size of a thumbnail, while still including many details. These remarkable finds come from the rich Aurignacian layers at Hohle Fels, which have produced some of the oldest figurative art known and date to the initial arrival of

    最高第 205:41 达到05:41 首次观测上榜20:53 观测离榜累计约15小时12分
  9. 09
    Keeping stem cells in check: A new mechanism by which cell junction proteins regulate tissue homeostasis

    In many animal tissues, stem cells continually divide to create new cells that replace old or damaged ones. However, this capacity requires strict regulation, as uncontrolled stem cell proliferation can disrupt tissue homeostasis and contribute to tumorigenesis.

    最高第 106:29 达到06:29 首次观测上榜21:41 观测离榜累计约15小时12分
  10. 10
    Most complete skeleton of 30 million-year-old dog discovered

    For decades, a 30 million-year-old fossil sat entombed in rock in an Oregon museum collection. When it was first found, paleontologists thought it might be an early relative of sheep, camels and pigs, whose fossilized skeletons are, in the researchers' view, abundant.

    最高第 206:29 达到06:29 首次观测上榜21:41 观测离榜累计约15小时12分
  11. 11
    Hydrothermal microbes shape seafloor minerals at newly found vents near Greek island

    In August 2023, the German research vessel METEOR set sail on Expedition M192 to the Greek island of Milos with Dr. Solveig Bühring as chief scientist. The mission was to locate and investigate previously unknown hydrothermal systems. Now, three years later, a new study highlights the surprising discoveries resulting from this expedition. At a newly discovered hydrothermal system at intermediate water depths of 100 to 250 meters (328 to 820 feet), researchers demonstrated how different intensiti

    最高第 207:33 达到07:33 首次观测上榜22:45 观测离榜累计约15小时12分
  12. 12
    A climate resilience strategy to strengthen US seafood competitiveness

    As the U.S. looks to expand domestic seafood production, a new University of Miami study argues that long-term competitiveness will depend on how well fisheries can withstand climate-driven disruptions. The study comes as NOAA advances new efforts to increase domestic seafood production and suggests that producing more seafood will require investments that reduce disruptions to the nation's fisheries and seafood supply chains.

    最高第 107:33 达到07:33 首次观测上榜22:45 观测离榜累计约15小时12分
  13. 13
    Humanoid classroom robots show potential as teaching assistants, not teacher replacements

    A New York school district made global headlines this week for plans to trial a humanoid robot named "Sally" in high school classrooms.

    最高第 107:49 达到07:49 首次观测上榜23:01 观测离榜累计约15小时12分
  14. 14
    Strain turns non-chiral crystals left- or right-handed on demand

    Mechanical strain is one of the most common tools used to tailor the properties of materials. In piezoelectric materials, stretching or compressing a crystal generates an electrical polarization. In piezomagnetic materials, it induces magnetization. Researchers at the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) and the University of Oxford have now discovered that mechanical strain also induces chirality in non-chiral crystals, opening a new direction to control this pro

    最高第 207:49 达到07:49 首次观测上榜23:01 观测离榜累计约15小时12分
  15. 15
    A step closer to artificial organs: UV light shapes arteriole-scale hydrogel vessels

    The creation of fully artificial organs is a sci-fi dream, and researchers in Japan may have brought it one step closer to reality by developing a new photofabrication technique (i.e., a light-controlled synthetic method) for constructing arteriole-scale tubular hydrogels. Their research is published in the journal Advanced Materials.

    最高第 104:53 达到04:53 首次观测上榜19:49 观测离榜累计约14小时56分
  16. 16
    Carrion emerges as a key force shaping ecosystems, disease and human evolution

    What happens after death? An international study led by the University of Granada (UGR), involving Ana Mateos and Jesús Rodríguez, researchers at the Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), argues that this question, long overlooked by ecology, can help us understand a wide range of processes and offer new perspectives across different disciplines.

    最高第 206:13 达到06:13 首次观测上榜21:09 观测离榜累计约14小时56分
  17. 17
    What sheep's teeth can tell us about life in a medieval Kazakhstan town

    You might not often think about the molars of livestock, but everything from the grass they eat to the water they drink can tell a story about how people lived centuries ago. An international collaboration led by University of Michigan researchers examined herd management in medieval Kazakhstan using isotopes embedded in the enamel of sheep's molars. They found that people living in the arid region fine-tuned their animal-management strategies to succeed in a challenging environment.

    最高第 106:13 达到06:13 首次观测上榜21:09 观测离榜累计约14小时56分
  18. 18
    Interaction between sugar beet and its pest varies depending on drought stress, researchers find

    Drought creates increasing challenges for agriculture. As well as affecting crop growth, it also affects interactions with pests. A research team at the University of Göttingen investigated how different levels of drought affect sugar beet's susceptibility to damage caused by the beet leaf miner (Pegomya cunicularia)—a fly whose larvae create visible tunnels inside leaves.

    最高第 205:25 达到05:25 首次观测上榜20:21 观测离榜累计约14小时56分
  19. 19
    The oceans near Australia may be the best places to fertilize for removing carbon dioxide

    Deploying ocean iron fertilization—a strategy for carbon dioxide capture—in higher latitudes rather than near the equator could reduce environmental impacts while still achieving removal of carbon dioxide from the atmosphere, according to a modeling study published in Nature. The findings offer insight into best practices for maximizing carbon dioxide removal while reducing potential ecological trade-offs typically associated with iron fertilization.

    最高第 105:09 达到05:09 首次观测上榜20:05 观测离榜累计约14小时56分
  20. 20
    Where have all the wasps gone this summer?

    Summer can be lovely—until a wasp turns up. Whether they present as an irritating picnic visitor or an uninvited attic guest, common social wasps are as much a part of our summer as festivals, sunscreen and the growing despair of how to entertain children who've forgotten how to be bored.

    最高第 204:21 达到04:21 首次观测上榜19:01 观测离榜累计约14小时40分
  21. 21
    Simple changes to fishing gear and handling can greatly improve survival of released coho salmon

    Coho salmon released by recreational anglers are far more likely to survive when handled without a landing net, according to new research. In salmon fisheries where anglers may be required to release salmon that are undersized, wild or not the target species, post-release survival is critical to conservation efforts. The paper is published in the journal Fisheries Research.

    最高第 205:09 达到05:09 首次观测上榜19:49 观测离榜累计约14小时40分
  22. 22
    Stable DNA building blocks enable faster oligonucleotide synthesis without oxidation

    The chemical synthesis of oligonucleotides (ONs) is central to modern molecular biology, diagnostics and nucleic acid therapeutics. While demand for high-quality ONs is increasing, the conventional synthetic method has long-standing efficiency challenges. Widely adopted P(III)-phosphoramidite-based ON synthesis requires an oxidation step after every nucleotide coupling cycle and uses moisture-sensitive building blocks, adding complexity to the workflow and slowing the process.

    最高第 104:21 达到04:21 首次观测上榜19:01 观测离榜累计约14小时40分
  23. 23
    Canada's infrastructure projects could damage Pacific salmon habitats

    The Canadian government is proposing sweeping changes to accelerate industrial development and reduce environmental oversight. These proposed legislative, regulatory and policy reforms could significantly diminish the government's capacity to assess environmental impacts and weaken protections for fish habitats and species at risk.

    最高第 204:53 达到04:53 首次观测上榜19:33 观测离榜累计约14小时40分
  24. 24
    Three-dimensional visualization of nanoplastic distribution in the neonatal mouse brain

    Nanoplastics—plastic particles smaller than one micrometer—are generated through the degradation and abrasion of plastic products and are increasingly detected in food, drinking water, air and biological tissues. Although the presence of plastic particles in animals and humans is well-established, determining how nanoplastics are distributed within complex organs, such as the brain, remains challenging.

    最高第 109:41 达到09:41 首次观测上榜23:33 观测离榜累计约13小时52分
  25. 25
    Icelandic fish 'hot tubs' reveal genetic adaptations to warming—and unexpected overeating

    New research, led by the University of Glasgow reveals that adaptation to warmer waters causes fish to display a range of behavioral and biological differences, including obesity, overeating and lower metabolism.

    最高第 104:05 达到04:05 首次观测上榜17:09 观测离榜累计约13小时4分
  26. 26
    Better recording of prisoner inequalities could help prevent deaths in custody, new study finds

    A lack of data on prisoner characteristics is providing an incomplete picture of who dies in prison and why, which may be contributing to preventable deaths in custody, according to a new report.

    最高第 204:05 达到04:05 首次观测上榜16:37 观测离榜累计约12小时32分
  27. 27
    Quantum in the palm of your hand: The evolution of superconducting qubits

    Electrons zipping through transistors, powering the screens on our smartphones. Light zooming from distant stars to Earth, moving faster than anything else in the universe. Protons enabling MRI machines to analyze people's injuries.

    最高第 111:33 达到11:33 首次观测上榜23:49 观测离榜累计约12小时16分
  28. 28
    Chicken kidney sponge could be 'outstanding' at cleaning up polluted ports

    Ports rank among the most disturbed marine environments. Pollutants like trash, oil and toxins from antifouling paints tend to accumulate in enclosed harbors. Invasive species arriving in ballast water may displace native wildlife, while ship propellers, sonars and dredging cause noise pollution that can interfere with animal communication. There is thus a great need for effective ways to clean up harbors. One promising method is renaturalization, in which hardy species that can survive under th

    最高第 112:05 达到12:05 首次观测上榜23:49 观测离榜累计约11小时44分
  29. 29
    A faster, cheaper way to map the world's forests with AI

    New research from the University of Cambridge offers an easy and readily available solution using AI and satellite data. In a paper published in the journal Science of Remote Sensing, researchers used embeddings by Tessera, a geospatial foundation model, to successfully map tree species across the Trentino region of the Italian Alps.

    最高第 103:49 达到03:49 首次观测上榜16:21 观测离榜上榜 2 次(重入 1 次)累计约10小时40分
  30. 30
    From single projection to many possibilities: A new tool for climate risk assessment

    Assessing how climate change will affect different regions usually requires running a complex chain of models. While this approach provides valuable insights, it is expensive and can cover only a limited set of scenarios and model runs. Together with partners, IIASA researchers have developed a faster alternative that uses available projections from Earth system or climate impact models to generate new regional climate and impact projections while capturing the uncertainty essential for understa

    最高第 114:13 达到14:13 首次观测上榜当日结束时仍在榜累计约9小时36分
  31. 31
    An ancient civilization of millions once flourished in the Amazon

    New research conducted using airborne laser scanning reveals that a multicultural civilization that flourished in southwestern Amazonia between 600 BCE and 850 CE was home to millions of people. Spanning roughly 183,000 square kilometers (71,000 square miles), the Aquiry civilization built large centers for political and ritual purposes.

    最高第 203:49 达到03:49 首次观测上榜12:05 观测离榜累计约8小时16分
  32. 32
    First electrically pumped perovskite polariton laser diode solves a decades-long challenge

    Resolving a long-standing problem in semiconductor physics and optoelectronics, a team of researchers from Skoltech—a VEB.RF group institution—and their colleagues from ITMO University and HSE University have for the first time demonstrated direct electrical pumping of a polariton laser based on a solution-processed halide perovskite microcrystal. Published in Nature, this solution to a decades-long technological challenge ushers in inexpensive nonepitaxial laser diodes operating under continuou

    最高第 103:33 达到03:33 首次观测上榜11:33 观测离榜累计约8小时
  33. 33
    Rain dampens France fire, as Spain reports 'almost no flames'

    Firefighters in France on Thursday were hopeful a massive forest fire was no longer spreading, as Spain said there were "almost no flames" left after a similar blaze near Madrid.

    最高第 116:21 达到16:21 首次观测上榜当日结束时仍在榜累计约7小时28分
  34. 34
    Machine learning LDL-C equation comparable to original Martin-Hopkins

    A simplified machine learning-based low-density lipoprotein cholesterol (LDL-C) equation provides results that are comparable to the original Martin-Hopkins equation, according to a study published online July 15 in JAMA Cardiology.

    最高第 108:53 达到08:53 首次观测上榜16:05 观测离榜累计约7小时12分
  35. 35
    Meet the astronomer digging into the Milky Way's 'fossils'

    Amina Helmi's passion for the Milky Way is clear as soon as one steps into her small office at the University of Groningen, in the north of the Netherlands.

    最高第 116:37 达到16:37 首次观测上榜当日结束时仍在榜累计约7小时12分
  36. 36
    The trillion-dollar question behind corporate net-zero pledges

    Corporate climate spending now steers trillions of dollars in transition finance worldwide. Does it drive genuine climate action? Research shows that accounting flexibility alone can make a company's reported emissions vary by roughly a factor of two—enough to appear either as a climate leader or a laggard. A new perspective in Nature Sustainability proposes developing industry-specific net-zero blueprints to close that gap.

    最高第 117:09 达到17:09 首次观测上榜当日结束时仍在榜累计约6小时40分
  37. 37
    Hollywood films distort real volcanic eruptions, study finds

    Towering explosions, flowing bright red lava and heroic scientists battling to save communities at risk have become the defining image of volcanoes in popular culture, from disaster films to epic blockbusters. New University of Bristol–led research has found these cinematic portrayals create a distorted view of how volcanoes behave in the real world.

    最高第 203:33 达到03:33 首次观测上榜09:41 观测离榜累计约6小时8分
  38. 38
    Little red dots may mark temporary black hole phase

    Since their discovery by NASA's James Webb Space Telescope in 2022, little red dots (LRDs) have been the subject of great interest to astronomers. Understanding the nature of these extremely distant, compact red sources has been a puzzling scientific endeavor.

    最高第 103:17 达到03:17 首次观测上榜08:53 观测离榜累计约5小时36分
  39. 39
    2D quantum memory device reaches single-electron limit of information storage

    Most electronic memory storage devices require the ability to trap large numbers of electrons for each bit of memory. In an ideal world, however, it would take only one electron. This would reduce space requirements and power consumption for devices. Now, a team in China has realized this goal with an ultrathin device capable of minimizing the stray capacitance that plagued earlier attempts. The new study, published in Science, describes how this novel device has overcome challenges in implement

    最高第 102:45 达到02:45 首次观测上榜07:49 观测离榜累计约5小时4分
  40. 40
    Gold-MXene catalyst converts nitrate to ammonia using sunlight and 1.5 volts

    Plants need nitrogen fertilizers, which are usually ammonia-based. Ammonia is therefore one of the most important chemical products. However, its production is currently extremely energy-intensive. An international team from TU Wien and Soochow University in China has developed a novel catalyst that can convert nitrate from wastewater into ammonia much more efficiently than before—powered by sunlight and about 1.5 volts.

    最高第 103:01 达到03:01 首次观测上榜08:05 观测离榜累计约5小时4分
  41. 41
    Does court-ordered community service work?

    For decades, court-ordered community service has been used as an alternative to incarceration. The intention is to reduce costs, provide restitution to the community and support individual rehabilitation. But does it actually work? A new report from the University of Georgia suggests it doesn't.

    最高第 203:01 达到03:01 首次观测上榜07:49 观测离榜累计约4小时48分
  42. 42
    Ancient turtle hunting could inform modern conservation throughout southern Caribbean

    Despite the promise of rebounding green sea turtle numbers, many sea turtle populations continue to flounder under the pressures of changing climates, overfishing and urbanization.

    最高第 119:01 达到19:01 首次观测上榜当日结束时仍在榜累计约4小时48分
  43. 43
    In wine country, barn owls offer eco-friendly alternative for rodent control

    With summer comes the warmth and sunshine that wine grapes need to thrive. It also comes with more vineyard-destroying rodents. To keep vermin at bay while reducing the need for harmful pesticides, California vineyards have been turning to an avian ally: barn owls.

    最高第 219:01 达到19:01 首次观测上榜当日结束时仍在榜累计约4小时48分
  44. 44
    Kitchen cling film helps build centimeter-scale ultrathin electronics and optics

    As materials become thinner—now reaching the thickness of single atoms—it has become increasingly difficult to create sufficiently large sheets and transfer them without cracking them into tiny flakes. Recent work by a broad Amsterdam-based team of scientists, published in the journal ACS Nano, presents a new technique that solves this problem using an unexpected material found in any home kitchen.

    最高第 202:45 达到02:45 首次观测上榜07:33 观测离榜累计约4小时48分
  45. 45
    Researchers find factors that cause respiratory impacts after flooding

    Researchers at the FAMU-FSU College of Engineering and Florida State University's Resilient Infrastructure and Disaster Response Center have identified how hurricane flooding can affect health long after a storm. In research published in the Journal of Cleaner Production, the researchers identified the factors most likely to create hazardous respiratory conditions inside homes after flooding.

    最高第 302:45 达到02:45 首次观测上榜07:33 观测离榜累计约4小时48分
  46. 46
    Gonorrhea's own enzyme triggers therapy against multidrug-resistant strains in lab tests

    Scientists at the Universities of Liverpool and Oxford have developed a promising new way to kill antibiotic-resistant strains of Neisseria gonorrhoeae, the bacterium that causes gonorrhea, using a targeted therapy that is activated at the bacterial surface while minimizing damage to human cells.

    最高第 102:29 达到02:29 首次观测上榜07:01 观测离榜累计约4小时32分
  47. 47
    Warm Agulhas Current fuels Western Cape's worst flood‑producing storms

    For communities across the Western Cape, cut-off low weather systems are a familiar threat. They can dump torrents of rain in a matter of hours, flooding roads, damaging homes and infrastructure, and, in the worst cases, causing loss of life. What scientists have long wanted to understand is why some of these storms become so destructive, and researchers at the University of Cape Town (UCT) found that the answer lies far offshore, in the warm waters of the Agulhas Current.

    最高第 202:29 达到02:29 首次观测上榜07:01 观测离榜累计约4小时32分
  48. 48
    What Godzilla can teach us about Donald Trump

    He tramples things without intending to. He was created by us. He never permanently goes away. In recent years, metaphorical representations of Donald Trump as the Japanese kaiju Godzilla have become common. Now, a paper published in De Gruyter Brill's The Forum argues that the Showa period Godzilla films (1954–75) can be read as an allegory of Trump's political career from 2016–24.

    最高第 102:13 达到02:13 首次观测上榜06:45 观测离榜累计约4小时32分
  49. 49
    Monkey friendships with dogs, deer and even pigs offer clues to the evolutionary origins of pet-keeping

    Why do humans keep pets? A new international study suggests that some of the behavioral foundations of human-animal companionship may have much deeper evolutionary roots than previously thought.

    最高第 202:13 达到02:13 首次观测上榜06:45 观测离榜累计约4小时32分
  50. 50
    Learning more about Australia's remote Northwest reefs with Indigenous rangers

    Offshore Northwest reefs Rankin Bank and Glomar Shoal are remote and little known, but Australian Institute of Marine Science (AIMS) researchers are using technology and people power to help us understand them better.

    最高第 119:33 达到19:33 首次观测上榜当日结束时仍在榜累计约4小时16分