A look at the SpaceX IPO by the numbers
Elon Musk is all about big numbers—millions, billions, even trillions—and there are plenty of them associated with SpaceX and Musk's plans to take the rocket maker public.
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כתבות אחרונות מאתר 'Phys'
Cosmic dawn fuel discovery unlocks early galaxy growth secrets
Astronomers have discovered a huge reservoir of cold molecular gas, the direct fuel for star formation, in REBELS-25, a massive, star-forming galaxy. The team, led from Leiden University, focused on REBELS-25, seen when the universe was only about 700 million years old, around 5% of its current age. The research is published in the journal Monthly Notices of the Royal Astronomical Society.
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CO₂ injection reveals hidden cement chemistry behind 13% stronger early strength
One September day, it started to snow inside MIT's Pierce Laboratory. Researchers depressurized a tank of liquid carbon dioxide (CO2), instantly freezing it and releasing solid flakes. These were blended into cement paste and pressed into disks roughly the size of a dime, each sealed with a thin layer of vegetable oil to keep water in and air out. The team trained lasers on each one, observing for the first time the transient chemical reaction that might explain why CO2-injected cement paste gains strength faster.
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New cavity control strategy improves performance of blue vertical-cavity surface-emitting lasers
GaN-based vertical-cavity surface-emitting lasers (VCSELs) are promising for displays, sensing and optical communication, but improving efficiency remains challenging. Researchers have now shown that "cavity tuning," which controls resonance wavelength, strongly affects laser performance. By analyzing variations across a VCSEL wafer, the team identified optimal mirror loss conditions and extracted device parameters. Their approach achieved 26.4% wall plug efficiency, offering guidance for next-generation high-efficiency visible-light semiconductor lasers.
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Third-grade impulses linked to lower academic achievement and education into adulthood
Can your behavior in third grade predict outcomes in high school and beyond? A new study, published in Developmental Psychology, says yes.
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Ancient DNA from Tuscan wells reveals origins of modern wine
Scientists analyzing 2,000-year-old grape seeds from ancient wells in Tuscany have mapped the most extensive genetic history of ancient grapevines recovered from a single site.
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Quantum friction causes light to slow down nanoworld movements
A research team in Bochum, Germany has unexpectedly found that light can slow down movements in the nanoworld. This is due to quantum friction, a phenomenon that has been poorly understood until now. The findings are published in the journal Nature.
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AI study reveals stark inequalities in global climate plans
An international team including researchers from the University of Alicante (UA) and the Universitat Politècnica de València (UPV) has used artificial intelligence to analyze the climate commitments submitted to the United Nations by 158 countries. Their conclusion is stark: Profound inequalities persist within global climate planning.
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Why cells started sticking together could help explain how animals first evolved
A recent study by Ruibao Li and Jennah Dharamshi published in Nature may help us understand the beginnings of animal evolution billions of years ago. These findings are the result of a collaboration among researchers at Indiana University Bloomington, the Institute of Evolutionary Biology in Spain and Uppsala University in Sweden, and were led by J. P. Gerdt and Iñaki Ruiz-Trillo.
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A new kind of entanglement helps quantum sensors tune out noise
In a quest to build the most accurate quantum sensors in the world, scientists are constantly improving their performance, making them more precise, more stable and more reliable. But eventually, physical constraints will prevent further improvements.
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