Author: The Conversation

In recent years, artificial intelligence (AI) has taken centre stage across various industries. From AI-generated art to chatbots in customer service, every sector is seemingly poised for disruption. It’s not just in your news feed every day – venture capital is pouring in, while CEOs are eager to declare their companies “AI-first”. But for those who remember the lofty promises of other technologies that have since faded from memory, there’s an uncanny sense of déjà vu. In 2017, it was blockchain that promised to transform every industry. Companies added “blockchain” to their name and watched stock prices skyrocket, regardless of whether the…

South Africa holds the presidency of the G20 this year. The group is made up of 19 of the world’s largest economies, the European Union and the African Union. A priority of South Africa’s G20 presidency is African connectivity: promoting cross-border energy trade and regional power pools as a way to share electricity across borders on the continent. David Phaho and Steven Mathetsa of the African Energy Leadership Centre set out how South Africa could use its presidency of the G20 to drive regional renewable energy sharing. What is a regional power pool? A regional energy power pool is where countries in a region share…

In a new study published today in Nature, we report the discovery of a new long-period transient – and, for the first time, one that also emits regular bursts of X-rays. Long-period transients are a recently identified class of cosmic objects that emit bright flashes of radio waves every few minutes to several hours. This is much longer than the rapid pulses we typically detect from dead stars such as pulsars. What these objects are, and how they generate their unusual signals, remains a mystery. Our discovery opens up a new window into the study of these puzzling sources. But it also deepens the mystery:…

Nearly everyone has encountered the unthinkable: Your smartphone landed in the toilet. Or you forgot to take off your smartwatch before jumping into the pool. Or maybe you meant to take those earbuds out of your pocket before running the laundry. What now? Internet forums are chock-full of advice to dry out that drenched device, but problematic myths about liquid protection and repair make it hard for consumers to separate fact from fiction. I’m a researcher who studies how technologies play a part in people’s everyday practices and experiences. My new book, “License to Spill: Where Dry Devices Meet Liquid Lives,” explores…

On 23 June 2025, the world will get a look at the first images from one of the most powerful telescopes ever built: the Vera C. Rubin Observatory. Perched high in the Chilean Andes, the observatory will take hundreds of images of the southern hemisphere sky, every night for 10 years. In doing so, it will create the most complete time-lapse record of our Universe ever assembled. This scientific effort is known as the Legacy Survey of Space and Time (LSST). Rather than focusing on small patches of sky, the Rubin Observatory will scan the entire visible southern sky every few nights. Scientists…

The world’s oceans cover more than 70% of Earth’s surface. They’re filled with currents, some much stronger than the fastest flowing large rivers. These currents can be harnessed as clean, marine renewable energy. Marine energy is much more predictable and reliable than many other forms of renewable energy because, unlike sun and wind, which regularly do not produce electricity, ocean currents never stop moving around the planet. New research has found that the eastern and south-eastern coasts of Africa have currents that put them among the world’s top potential locations for ocean energy production. Researchers Mahsan Sadoughipour, James VanZwieten, Yufei Tang…

This week, the US Federal Bureau of Investigation revealed that two men suspected of bombing a fertility clinic in California last month allegedly used artificial intelligence (AI) to obtain bomb-making instructions. The FBI did not disclose the name of the AI program in question. This brings into sharp focus the urgent need to make AI safer. Currently, we are living in the “wild west” era of AI, where companies are fiercely competing to develop the fastest and most entertaining AI systems. Each company wants to outdo competitors and claim the top spot. This intense competition often leads to intentional or unintentional…

As winter approaches, memories of the past haunt South Africans in more ways than one. The country has experienced years of rolling blackouts, known locally as load shedding. During the worst periods of these power cuts in 2022 and 2023, South Africans who did not own solar photovoltaic systems or generators would go without electricity for up to 12 hours a day. Due to the extent of the damaging power outages, solar power was adopted quickly in South Africa. For example, in 2020, smaller systems installed at homes or businesses made up just 38% of the country’s solar systems. At that time, 62%…

As meaning-makers, we use spoken or signed language to understand our experiences in the world around us. The emergence of generative artificial intelligence such as ChatGPT (using large language models) call into question the very notion of how to define “meaning.” One popular characterisation of AI tools is that they “understand” what they are doing. Nobel laureate and AI pioneer Geoffrey Hinton said: “What’s really surprised me is how good neural networks are at understanding natural language — that happened much faster than I thought…. And I’m still amazed that they really do understand what they’re saying.” Hinton repeated this claim in an interview with Adam Smith, chief…

Whether you’re streaming a show, paying bills online or sending an email, each of these actions relies on computer programs that run behind the scenes. The process of writing computer programs is known as coding. Until recently, most computer code was written, at least originally, by human beings. But with the advent of generative artificial intelligence, that has begun to change. Now, just as you can ask ChatGPT to spin up a recipe for a favourite dish or write a sonnet in the style of Lord Byron, you can now ask generative AI tools to write computer code for you.…