Science

This tuna-inspired bot borrows a clever trick from the real fishZhonglu Lin et al. (2024) A tuna-shaped robot takes advantage of the real fish’s secret for speed and nimbleness: selectively folding or sticking out its fins, a feature that could improve aquatic robot designs. Tuna are some of the ocean’s fastest swimmers, thanks in part to the way they retract or fold their fins to reduce drag. Zhonglu Lin at Xiamen University in China and his colleagues investigated how such fins could make robots more agile. They built a tuna-shaped robot that was half a metre long. It could be controlled with a motor in its head, another in its dorsal fin on its back and a third in the caudal fin at the end of its tail. The researchers filmed their robot as it swam across a pool...

With rising sea levels, extreme waves and storm surges, Venice is notoriously vulnerable to the impacts of climate change. A Sustainable Serenissima: Water and the Future of Venice program provides undergraduate students the opportunity to explore ways in which contemporary Venice confronts sustainability challenges and develops resilience. Studying in Venice offers a unique opportunity for students to experience lessons coming alive, says Jenna Lawrence, a lecturer at Columbia Climate School and lead instructor for the Venice class. “Venetians have been grappling with sustainable development for over a thousand years, actively maintaining their urban lagoon ecosystem to ensure that the wetlands and mudflats continue to soften storms, provide food, keep rising tides at bay and sto...

We tend not to dwell on the fact that we exist in three dimensions. Forwards-back, left-right, up-down; these are the axes on which we navigate the world. When we try to imagine something else, it typically conjures images from the wildest science fiction – of portals in the fabric of space-time and parallel worlds. Yet serious physicists have long been spellbound by the prospect of extra dimensions. For all their intangibility, they promise to resolve several big questions about the deepest workings of the universe. Besides, they can’t be ruled out simply because they are difficult to imagine and even harder to observe. “There’s no reason why it has to be three,” says Georges Obied at the University of Oxford. “It could have been two; it could have been four or 10.” ...

In recent years, climate litigation has witnessed a surge in cases across the world. While scholarly interest has predominantly focused on cases from the Global North, attention to litigation originating in the Global South has been lacking, yet crucial in understanding the broader climate litigation landscape. Credit: Sora Shimazaki via pexels In July, the Sabin Center published Climate Litigation in the Global South: Mapping Report, which serves to shine a spotlight on the current state of climate litigation in the Global South. The report utilizes data from the Sabin Center’s Global Climate Change Litigation databases, which has seen an influx of new cases in recent years, thanks to enhanced data collection efforts and more cases being filed, especially in the past four years. By...

A cyborg bested me. When I played the online game WebGrid, using my finger on a laptop trackpad to click on squares appearing unpredictably on a grid, my speed was 42 squares per minute. When self-described cyborg Noland Arbaugh played it, he used a chip embedded in his brain to send telepathic signals to his computer. His speed? 49. Arbaugh was paralysed from the neck down in 2016. In January, he became the first person to be surgically implanted with a chip made by Neuralink, a company founded by Elon Musk. Since then, Arbaugh has been operating his phone and computer with his thoughts, surfing the web and playing Civilization and chess. But Neuralink isn’t the only outfit melding human minds with machines using brain-computer interfaces (BCIs). Thanks to a series o...