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How did life begin on Earth? While there are several theories, an Indian scientist working in the US has proposed a new set of “origins of life,” chemical reactions that could lead to the development of amino acids – the building blocks of protein and DNA – from chemicals and gases present on the ancient Earth. Four billion years ago, Earth looked very different, lifeless and covered by a vast ocean. Over millions of years, in that primordial soup, life arose. There are several hypotheses about how life arose from inorganic molecules. Now, a team led by Ramanarayanan Krishnamurthy at the Scripps Research Institute, La Jolla, California has discovered a new set of chemical reactions that use cyanide, ammonia, and carbon dioxide — all thought to be common on the early Earth — to produce amino and nucleic acids. acids, building blocks of protein and DNA. “We came up with a new paradigm to explain the shift from pre-biotic to biotic chemistry,” said K...

The doughnut-shaped rings surrounding many supermassive black holes tell researchers how fast extraterrestrial objects are feeding and could change how black holes are viewed from Earth. Credits: ESA/NASA, AVO project and Paolo Padovani The researchers used X-ray telescopes and new data analysis techniques to describe extraterrestrial objects. Black holes with different light signatures that were once thought to be the same object viewed from different angles are actually in different stages of their life cycle, according to a study led by Dartmouth scientists. New research on black holes known as “active galactic nuclei,” or AGNs, says that it definitively demonstrates the need to revise the widely used “AGN unified model” that characterizes supermassive black holes because they all share the same properties. This study provides an answer to a troubling space mystery and should allow researchers to create more precise models of the evolution of the universe and...

Richmond had jumped from 42 points behind to secure a superb win over the Brisbane Lions at MCG. In Sunday’s other fixtures, the Gold Coast beat the West Coast by three points, while Essendon beat COVID-hit North Melbourne by eight goals. After conceding the first six goals for most of the game against the Lions, the Tigers took the lead in the 16th minute of the final quarter. The two sides traded punches for the final stages, with veteran Mitch Robinson missing a golden opportunity to put the Lions back in front after picking up a free kick from 15 yards. A fatal error from defender Darcy Gardiner allowed Tigers star Tom Lynch to score his fourth and last-minute winner. The Tigers ended a three-game winless run to win 15.14 (104) to 14.13 (97) in Shane Edwards’ 300th senior appearance. Importantly for Richmond, it provides a great opportunity for the ninth-placed Tigers to play in this year’s final with the last three games in favor of the season. But for the Lions, ...

Bates, 42, is often seen driving a $300,000 Mercedes-Benz SUV around the millionaire enclave of Wategos Beach. A regular on the Sydney and Byron Bay social scene for years, he is a Sydney publicity expert Roxy Jacenko the school’s official date was decades ago. Described by a former friend as a proponent of a carefully cultivated high-flying svengali aura, Bates is notorious for lavishing his girlfriends with expensive gifts, collecting expensive lunch bills at his neighborhood watering hole, the majestic Rae’s on Wategos Beach, where he is known to order some bottle of Krug champagne and a giant tub of caviar. Potential investors, some of whom gave up hundreds of thousands of dollars, were hooked. Watego Beach in Byron Bay. Credit: Peter Braig PS saw them among wealthy guests dressed in all white at Paspaley’s exclusive 2019 jewelery party at the luxurious Qualia resort on Hamilton Island, where they sipped vintage champagne and stroked a multi-million dollar pearl ...

Four billion years ago, Earth looked very different from today, lifeless and covered by a vast ocean. Over millions of years, in that primordial soup, life arose. Researchers have long theorized how molecules come together to trigger this transition. Now, scientists at Scripps Research have discovered a new set of chemical reactions that use cyanide, ammonia, and carbon dioxide — all thought to be common on the early Earth — to produce amino acids and nucleic acids, the building blocks of protein and DNA. “We have come up with a new paradigm to explain the shift from prebiotics to biotic chemistry,” says Ramanarayanan Krishnamurthy, PhD, a professor of chemistry at Scripps Research, and lead author of the new paper, published July 28, 2022 in the journal Nature Chemistry. “We think the type of reaction we’ve described is probably what could have happened on the early Earth.” In addition to providing researchers with insight into early Earth chemistry, t...

The researchers found that long-lived organisms often exhibit high expression of genes involved in DNA repair, RNA transport, and cellular framework organization and low expression of genes involved in inflammation and energy consumption. Researchers from the University of Rochester interested in longevity genetics propose new targets to fight aging and age-related disorders. Mammals that age at very different rates have been created through natural selection. The naked mole rat, for example, can live up to 41 years, which is 10 times longer than rats and other rodents of comparable size. What causes longer life? An important component of the puzzle, according to a recent study by biologists at the University of Rochester, is found in the mechanisms that control gene expression. Vera Gorbunova, Doris Johns Cherry professor of biology and medicine, Andrei Seluanov, the publication’s first author, Jinlong Lu, a postdoctoral researcher in Gorbunova’s lab, and other researcher...

About 385 million years ago during the Late Devonian period, a fish walked from the water to the shore in search of a new home. The fins are strong enough to move on land. Thus began the history of vertebrates on land. Fast forward to 2004 in the Canadian Arctic Islands in the Nunavut Region, where researchers found two fossils about a kilometer apart. One came from the specimen that came to be known as Tiktaalik roseae (pronounced tick-TA-lick) . The others resemble teenagers Tiktaalik , especially from the appearance of his jaw. But nearly 20 years after its discovery, paleontologists suspect it was something else entirely. Researchers from the University of Chicago and Drexel University recently published a study in the journal Natural where they describe a new fish species that may have preceded Tiktaalik . What’s new – Researchers now ascribe the second fossil to a new fish species they call Qikiqtania wake up . Pronounced “kick-kiq-TA-nee-ah,” the s...

Penguins are no strangers to climate change. Their life history has been shaped by fluctuations in temperature, and their bodies are highly specialized for some of the most extreme conditions on Earth. However, scientists fear the penguin’s evolutionary path may have stalled, thanks to the lowest evolutionary rate ever detected in birds. An international team of researchers has just published one of the most comprehensive studies on penguin evolution to date, which is the first to integrate data from living and fossil penguin species. The research reveals a general chaotic penguin life history, with three-quarters of all known penguin species – now represented only by fossils – already extinct. “Over 60 million years, this iconic bird has evolved into a highly specialized marine predator, and is now well-adapted in some of the most extreme environments on Earth,” the authors wrote. “However, as their evolutionary history reveals, they now stand as guardians high...

Jaide Fisher, 26, traveling with friends and colleagues from Hawkesbury, was still queuing outside the festival at 8.30am on Friday, having arrived at 5.30pm on Thursday. “We finally decided to sleep on the back of our ute at 2.30 this morning as we hadn’t been moving for hours. We make a very uncomfortable bed to our Eskys on the ute tray,” he says. Fisher said all he wanted to do was “get out of here” but said the trio had spent $1000 each on the festival and were worried they would not receive a refund. “We don’t even want to go in anymore, but we wouldn’t leave if we were going to throw all that money away. After this experience, I will probably never go again,” he said as the line reached 15 hours. The artist who will be performing on Friday said Era and the Herald they worry about how they will get to the site on Friday in time to perform. “The ground staff did their best, but there was a lack of communication and we weren’t sure what wo...

Every biological process is highly dependent on temperature. This applies to the very small, the very large, and every scale in between, from molecules to ecosystems and in every environment. A general theory explaining how life depends on temperature is lacking — until recently. In a paper published in the Proceedings of the National Academy of Sciences, researchers led by Jose Ignacio Arroyo, a Santa Fe Institute Postdoctoral Fellow, introduce a simple framework that strictly predicts how temperature affects living things, at all scales. “This is very basic,” says SFI External Professor Pablo Marquet, an ecologist at the Pontifica Universidad Catolica de Chile, in Santiago. Marquet, Ph.D. thesis advisor, is also working on the model. “You can apply this to almost any process that is affected by temperature. We hope this will be an important contribution.” Marquet noted that such a theory could help researchers make accurate predictions in a variety of areas, including biologica...