OpenAI boss Sam Altman has finally signed up for his own Worldcoin cryptocurrency, four years after founding the controversial venture. The tech boss, whose AI startup created ChatGPT, recently raised $100 million to finance his crypto side project, which involves scanning millions of people’s eyeballs in order to trade their biometric data for free cryptocurrency. Until this week he had been unable to join the project due to it being unavailable in his native US. On a trip to Europe on Tuesday, where the technology is not restricted, Mr Altman signed up to the venture through a silver orb that uses iris scanning technology to capture user data. This data is used to verify an individual’s “unique personhood”, which entitles them to a free share of Worldcoin tokens when it officially launches. More than 1.5 million people have already signed up for the project, according to the company’s own figures, with the launch expected to take place in the coming weeks. The company describes the cryptocurrency as a “new, collectively owned global currency that will be distributed fairly to as many people as possible”, claiming that everyone in the world is eligible for a free share of it. The Worldcoin tokens, called WLD, is similar to other cryptocurrencies in that it can be used as a store of value or to make payments, with the project’s website stating that it can be used for “remittances, [to] tip artists, [and] buy and sell goods and services”. Worldcoin has generated controversy for collecting biometric data from people in developing countries in exchange for free gifts and cash, but the company claims this unique approach to crypto means it can be distributed fairly and inclusively After scanning a person’s iris with the spherical device, which the company calls the “chrome orb”, a user is given their allotted share of Worldcoin. This means no one is able to get more than their individual free share of the digital currency, though it will still possible to buy and trade it separately, just like any other cryptocurrency. “Nothing like this has ever been done before and the outcome is uncertain,” Mr Altman wrote in a blog post in 2021, alongside other Worldcoin co-founders. “But we are obsessed with the idea that revolutionary new technologies like blockchain and cryptography can let us do something collectively that even governments have not been able to: increase individual empowerment and equality of opportunity on a global scale.” Read More What is superintelligence? How AI could replace humans as the dominant lifeform on Earth

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Divorced men with diabetes are at the highest risk of having some or all of their feet and legs amputated because of it, research has found. According to a study of almost 67,000 people with diabetes in Sweden, people with the condition who are divorced are 67 per cent more likely to have to undergo a lower limb amputation than those who are married. Meanwhile men are at 57 per cent greater risk than women. On average, 184 people a week in England have some part of a lower limb removed surgically to stop infection spreading and killing them. Lasantha Wijesinghe, a consultant vascular surgeon in England who performs lower limb amputations, said they were usually necessary because the person’s life was at risk because of sepsis. The authors of the study, which has not been peer-reviewed yet, said they could not be sure why divorcees of both sexes ran such a greater risk than married people, but speculated that this “may be due to a change in self-care and food habits observed in people when they divorce and are more likely to be living alone”. “Specifically with men, this is often related to more social isolation, with a secondary effect of low physical activity,” they added. Older people are also at higher risk of an amputation and patients who are on insulin treatment, have a pre-existing foot condition such as neuropathy or who smoke are also at higher risk. The study also concluded that obese people have a lower risk than those with a standard weight. The authors could not explain this finding but suggested it could be down to chance. Dr Faye Riley, the research communications manager at Diabetes UK, said: “This study identifies a range of factors that may be linked with a higher risk of amputation among people with diabetes, and raises interesting questions about how social support can influence our health behaviours and outcomes. By pinpointing which people with diabetes are most at risk, support can be targeted where it’s most needed.” 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.

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