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כתבות אחרונות מאתר 'Phys'
Phys

Astronomers thought the early universe was full of hydrogen: Now they've found it‎

The Eberly Telescope Dark Energy Experiment (HETDEX) has discovered tens of thousands of gigantic hydrogen gas halos, called "Lyman-alpha nebulae," surrounding galaxies 10 billion to 12 billion years ago. Known as Cosmic Noon, this is an epoch in the early universe when galaxies were growing their fastest. To spur this growth, they would have needed access to vast reservoirs of hydrogen gas, a key building block for stars. However, until recently, astronomers had only found a handful of these essential structures.

18:47
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Phys

A new equation may help baristas produce the perfect espresso shot every time‎

Everyone's idea of the perfect cup of coffee is different. Whether you have yours black, with a splash of milk or extra sweet, you like it your way. But is there a universal law that governs how that flavor gets into your cup? According to new research published in the journal Royal Society Open Science, part of the answer lies in the permeability of the puck, the name for the bed of tightly packed coffee grains through which water passes under high pressure.

18:22
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Phys

Giant step for humankind: Artemis crew to set space distance record‎

Four Artemis II astronauts are taking a giant step for humankind Monday when they shoot deeper into space than anyone before and glimpse parts of the moon never seen by the naked eye.

18:22
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Phys

A secret odorant code patches a problematic relationship between pollinators and flowers‎

A plant uses a rare scent to guide its pollinator to male flowers first and to female flowers later, finds a study led by Kobe University. The work, appearing in Current Biology, uncovers a precise chemical system that not only keeps this partnership specific but also helps ensure it remains beneficial to both parties.

18:06
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Phys

'Hot Jupiter' orbiting a metal-poor star discovered‎

Using NASA's Transiting Exoplanet Survey Satellite (TESS), an international team of astronomers has discovered a new "hot Jupiter" exoplanet. The newfound alien world, designated TOI-7169 b, orbits a metal-poor star, which is rare among exoplanets. The finding was detailed in a paper published March 26 on the arXiv pre-print server.

17:51
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Phys

Alignment during conversations is highly situation-dependent, study finds‎

When people are talking, they can start to unconsciously mirror each other, for instance, in the words they use, their sentence structures and even hand gestures. This tendency to mirror others can lead to smoother conversations, while also fostering empathy and collaboration.

17:25
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Phys

Electrons in moiré crystals explore higher-dimensional quantum worlds‎

The electrons that power our society flow left and right through the circuitry in our electronics, back and forth along the transmission lines that make up our power grid, and up and down to light up every floor of every building. But the electrons in newly discovered "moiré crystals" move in much stranger ways. They can move left and right, back and forth, or up and down in our three-dimensional world, but these electrons also act as if they can teleport in and out of a mysterious fourth dimension of space that is perpendicular to our perceivable reality.

17:04
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Phys

Structural color can now be printed with an inkjet printer‎

While traditional printer pigments fade and most structural color can't be printed, Kobe University material engineer Sugimoto Hiroshi has been working on nothing short of a revolution in the way color is produced.

16:45
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Phys

Precisely designed oxygen carriers enable low-temperature methane reforming‎

"Methane reforming" is a process that turns methane (CH4) into hydrogen—which can be utilized as an environmentally friendly source of energy. The biggest downside is that methane reforming, in its current state, is not quite so gentle on the environment.

16:31
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Phys

Mutant clownfish reveals how nature draws boundaries‎

In 1999, a clownfish (Amphiprion ocellaris) hatched in the aquarium of a tropical fish hobbyist in the UK. These clownfish are prized by aquarists for their unique pattern of three straight white bars bordered by a thin black line. But this UK fish was special: instead of the usual straight bars, it had wavy, corrugated patterns, symmetrical on both sides. The patterns were inherited across generations, leading to a lineage named "Snowflake," but the mechanism causing this irregular patterning remained a mystery.

16:31
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