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Phys.org is a science, research and technology news aggregator where much of the content is republished directly from press releases and news agencies-in a practice known as churnalism. It also produces some science journalism.Source
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Not bot, not beast: Scientists create first ever living, programmable organism

Not bot, not beast: Scientists create first ever living, programmable organism

January 20, 2020by Simon Coghlan and Kobi Leins,A remarkable combination of artificial intelligence (AI) and biology has produced the world's first "living robots".This week, a research team of roboticists and scientists their recipe for making a new lifeform called xenobots from . The term "xeno" comes from the frog cells (Xenopus laevis) used to make them.One of the researchers as "neither a traditional robot nor a known species of animal", but a "new class of artifact: a living, programmable organism".Xenobots are less than 1mm long and made of 500-1000 living cells. They have various...

March 1, 2021
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Precise magnets 3-D printed from special stainless steel

Precise magnets 3-D printed from special stainless steel

June 12, 2020byIt looks quite inconspicuous to the casual beholder, hardly like groundbreaking innovation: a small metallic chessboard, four millimeters long on either side. At first glance, it shines like polished steel; at second glance, minute differences in color are visible: The tiny chessboard has 16 squares, eight appear slightly darker, the other eight a bit lighter.The unassuming material sample goes to show that 3-D printing with the help of laser beams and is not only suitable for creating new geometric shapes, but also for producing new materials with completely new...

June 12, 2020
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'A bad time to be alive': Study links ocean deoxygenation to ancient die-off

'A bad time to be alive': Study links ocean deoxygenation to ancient die-off

April 14, 2020by Danielle Torrent Tucker,In a new study, Stanford researchers have strongly bolstered the theory that a lack of oxygen in Earth's oceans contributed to a devastating die-off approximately 444 million years ago. The new results further indicate that these anoxic (little- to no-oxygen) conditions lasted over 3 million years—significantly longer than similar biodiversity-crushing spells in our planet's history.Beyond deepening understandings of ancient mass extinction events, the findings have relevance for today: Global climate change is contributing to declining in the and...

April 14, 2020
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Machine learning finds a surprising early galaxy

Machine learning finds a surprising early galaxy

August 3, 2020by National Institutes of Natural SciencesNew results achieved by combining big data captured by the Subaru Telescope and the power of machine learning have discovered a galaxy with an extremely low 1.6% oxygen abundance, breaking the previous record of the lowest abundance. The measured oxygen abundance suggests that most of the stars in this galaxy formed very recently.To understand , astronomers need to study galaxies in various stages of formation and evolution. Most of the galaxies in the modern universe are mature galaxies, but standard cosmology predicts that there may...

August 3, 2020
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World's first 3-D simulations of superluminous supernovae

World's first 3-D simulations of superluminous supernovae

April 27, 2020by Linda Vu, NERSCFor most of the 20th century, astronomers have scoured the skies for supernovae—the explosive deaths of massive stars—and their remnants in search of clues about the progenitor, the mechanisms that caused it to explode, and the heavy elements created in the process. In fact, these events create most of the cosmic elements that go on to form new stars, galaxies, and life.Because no one can actually see a supernova up close, researchers rely on to give them insights into the physics that ignites and drives the event. Now for the first time ever, an...

April 27, 2020
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Tiny nanospindles enhance use of ultrasound to fight cancer

Tiny nanospindles enhance use of ultrasound to fight cancer

December 8, 2020byUltrasound can be used to treat cancer when used in combination with molecules that sensitize the system to sound waves. These sonosensitizers generate toxic reactive oxygen species that attack and kill tumor cells.In Applied Physics Reviews, scientists from Soochow University in China report a new type of sonosensitizer based on a vanadium-doped titanium dioxide, V-TiO2, that enhances the amount of damage ultrasound inflicts on tumors. Studies in mice showed that tumor growth was markedly suppressed when compared to a .Organic molecules have been used in the past as...

December 10, 2020
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Scientists uncover principles of universal self-assembly

Scientists uncover principles of universal self-assembly

April 20, 2020by Bilkent University Faculty of ScienceFor years, researchers have searched for the working principles of self-assembly that can build a cell (a complex biological organism) as well as a crystal (a far simpler inorganic material) in the same way.Now, a team of scientists in Turkey has demonstrated the fundamental principles of a universal process acting on a range of materials—starting from a few atoms-large quantum dots up to nearly 100 trillion atoms-large human cells. Their method is highlighted in Nature Physics."To initiate self-assembly, either you force the system to...

April 20, 2020
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US successfully launches unmanned reusable drone for space experiments

US successfully launches unmanned reusable drone for space experiments

May 17, 2020The US Air Force on Sunday successfully launched its high-tech drone X-37B, placing the reusable vehicle into orbit for its sixth secretive mission in space.The , which resembles a smaller version of the manned space shuttles retired by the US space program in 2011, was launched from Cape Canaveral in Florida, the Air Force said.It will spend months in orbit, remotely conducting a series of experiments."Congratulations on the 6th mission of the X-37B reusable spacecraft," Defense Secretary Mark Esper tweeted shortly after the launch.The huge Atlas V launch vehicle took off with...

May 17, 2020
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Methane forms under space conditions in laboratory

Methane forms under space conditions in laboratory

April 14, 2020byAn international team of astronomers has shown in a laboratory at Leiden University (the Netherlands) that methane can form on icy dust particles in space. The possibility had existed for quite some time, but because the conditions in space were difficult to simulate, it was not possible to prove this under relevant space conditions. The researchers will publish their findings Monday evening in the journal, Nature Astronomy.Methane on EarthMethane, known to us as main compound of natural gas, is one of the simplest hydrocarbons. It consists of a carbon atom with four : CH4....

April 14, 2020
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Energy scavenging nanogenerator finds power all around us

Energy scavenging nanogenerator finds power all around us

October 20, 2020byImagine a mobile phone charger that doesn't need a wireless or mains power source. Or a pacemaker with inbuilt organic energy sources within the human body.Australian researchers led by Flinders University are picking up the challenge of "scavenging" invisible power from low-frequency vibrations in the surrounding environment, including wind, air or even contact-separation energy (static electricity)."These so-called triboelectric nanogenerators (or TENGs) can be made at low cost in different configurations, making them suitable for driving such as personal electronics...

October 21, 2020
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