Hubble finds that ghost light among galaxies stretches far back in time

In giant clusters of hundreds or thousands of galaxies, innumerable stars wander among the galaxies like lost souls, emitting a ghostly haze of light. These stars are not gravitationally tied to any one galaxy in a cluster. The nagging question for astronomers has been: how did the stars get so…

Researchers reveal an added layer of nuance in our sense of smell

The delicate fragrance of jasmine is a delight to the senses. The sweet scent is popular in teas, perfumes and potpourri. But take a whiff of the concentrated essential oil, and the pleasant aroma becomes almost cloying. Indeed, part of the flower’s smell comes from the compound skatole, a prominent…

Live updates: House speaker vote and news

  After former President Donald Trump publicly endorsed GOP Leader Kevin McCarthy for House speaker Wednesday, urging Republican holdouts to “vote for Kevin” and “close the deal,” some still remain opposed, raising questions about Trump’s dwindling influence on Capitol Hill in the midst of his third presidential campaign. Longtime Trump…

‘Jumping genes’ help fungus kill salamanders

A fungus that infects salamanders contains multiple copies of the same “jumping genes,” scientists have discovered. Jumping genes, called transposons, can “copy and paste” themselves and impact the organism. Most organisms have some repeated parts of their DNA, some of which are jumping genes, but this can be harmful —…

Simple nasal swab can provide early warning of emerging viruses

As the COVID-19 pandemic showed, potentially dangerous new viruses can begin to spread in the population well before the global public health surveillance system can detect them. However, Yale researchers have found that testing for the presence of a single immune system molecule on nasal swabs can help detect stealthy…

Gut bacteria may play a role in diabetes

One type of bacteria found in the gut may contribute to the development of Type 2 diabetes, while another may protect from the disease, according to early results from an ongoing, prospective study led by investigators at Cedars-Sinai. The study, published in the peer-reviewed journal Diabetes, found people with higher…

Cheap, sustainable hydrogen through solar power: Withstanding high temperatures and the light of 160 suns, a new catalyst is 10 times more efficient than previous sun-powered water-splitting devices of its kind

A new kind of solar panel, developed at the University of Michigan, has achieved 9% efficiency in converting water into hydrogen and oxygen — mimicking a crucial step in natural photosynthesis. Outdoors, it represents a major leap in the technology, nearly 10 times more efficient than solar water-splitting experiments of…

New ‘semi-sub’ shows spy potential of sailing at waterline

An unmanned semi-submersible vehicle developed at Washington State University may prove that the best way to travel in water undetected and efficiently is not on top, or below, but in-between. The roughly 1.5-foot-long semi-sub prototype, built with off-the-shelf and 3D-printed parts, showed its seaworthiness in water tests, moving quickly with…

A step towards solar fuels out of thin air

A device that can harvest water from the air and provide hydrogen fuel — entirely powered by solar energy — has been a dream for researchers for decades. Now, EPFL chemical engineer Kevin Sivula and his team have made a significant step towards bringing this vision closer to reality. They…

Poland says Germany refused talks on World War II reparations | CNN

Reuters  —  Germany has rebuffed the latest push by Poland’s nationalist government for vast reparations over World War II, saying in response to a diplomatic note that the issue was closed, the foreign ministry in Warsaw said on Tuesday. A spokesperson for the German foreign ministry said it had responded…