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HOUSTON--(BUSINESS WIRE)--Jun 12, 2023--

Scientists have found that one of the key pillars of theory around how life works – that it depends on carbon – may not be the case on other planets. Here on Earth, life depends on organic compounds which are composed of carbon, and often involve other elements such as sulphur, oxygen, hydrogen, nitrogen and phosphorus. With organic compounds, life is partly sustained by chemical interactions called autocatalysis, which are self-sustaining. That means they produce molecules which then enable the reaction to happen again, and do not need any outside influence to keep going on. In the new study, scientists looked for autocatalysis in non-organic compounds. The theory is that if autocatalysis helps drive a process called abiogenesis – the origin process for life – then this origin process could also come from non-organic matter. Betül Kaçar, an astrobiologist, bacteriologist and evolutionary biologist at the University of Wisconsin-Madison, told news outlet Space.com: “It's important to explore these possibilities so that we have an idea of what all forms of life can look like, not just Earth life.” "One of the major reasons that origin-of-life researchers care about autocatalysis is because reproduction — a key feature of life — is an example of autocatalysis. “Life catalyses the formation of more life. One cell produces two cells, which can become four and so on. “As the number of cells multiply, the number and diversity of possible interactions multiplies accordingly.” The scientists searched in a huge trove of existing scientific documents for examples of autocatalysis, and found 270 different cycles of the reactions. Most of the 270 examples did not feature organic compounds, but rather elements which are rare in life forms such as mercury, or the radioactive metal thorium. “It was thought that these sorts of reactions are very rare,” Kaçar said in a statement. “We are showing that it's actually far from rare. You just need to look in the right place.” Now, it means scientists can test these cycles to get a better understanding of how autocatalysis can work. “The cycles presented here are an array of basic recipes that can be mixed and matched in ways that haven't been tried before on our planet,” said study author Zhen Peng, also an evolutionary biologist at the University of Wisconsin-Madison. “They might lead to the discovery of completely new examples of complex chemistry that work in conditions where carbon- or even silicon-based cycles are too either combusted or frozen out.” The scientists published their findings in the Journal of the American Chemical Society. Sign up to our free Indy100 weekly newsletter Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

Bumble is known primarily as a dating app, but you can also swipe for friends

A woman who noticed her food and drink was being stolen by her flatmates has revealed the lengths she took to get her own back. TikToker Sarah (@saatj32) opened up about the drastic measures she was forced to take, explaining in a video: "I had to poison my food because my flatmates kept stealing it." She then shared a recording of herself carrying out the act: opening a carton of organic British skimmed milk and pouring in the contents of a salt container. Sign up to our free Indy100 weekly newsletter "People want to drink my milk and want to put it back," and added how she's going to see "whose who." After pouring in the salt, she can then be seen closing the carton and shaking it to mix the salt, before giving it a whiff and adding even more salt to the mixture. In the caption she wrote: "And I have absolutely no regrets and yes someone drank it." @saatje32 And I have absolutely no regrets and yes someone drank it #university #flatmates #freshers Since then, the video has been viewed more than 277,000 times and racked up hundreds of comments from people sharing similar experiences of sticky-fingered flatmates. One person wrote: "I like this, because when they go low, I go LOWER." "I literally told my one flatmate that I'm gonna put stuff in my food 'cause it keeps being taken. She ended up consuming it as if I didn’t warn her," said another. A third added: "This video is hilarious to me cause I basically have a video of me doing the exact same thing." Meanwhile, others shared what they would have done in the same situation. One said: "Add lemon juice and it will immediately curdle. Instantly ruins everything they’re making and you can deny doing anything." "Just salt? Should have put chicken grease and dyed it blue or sum for evidence," wrote another. Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

U.S. Secretary of State Antony Blinken is urging Israeli leaders to respect international law as Israel wages its war against Hamas in Gaza

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