Antivaccine videos slip through YouTube’s advertising policies, new study finds

As COVID-19 vaccines approach the finish line, public health officials around the world are battling waves of vaccine misinformation that could derail efforts to protect their citizens. The video platform YouTube recently pledged to help by removing videos containing COVID-19 misinformation and expanding on earlier efforts to limit recommendations for […]

An underwater navigation system powered by sound

GPS isn’t waterproof. The navigation system depends on radio waves, which break down rapidly in liquids, including seawater. To track undersea objects like drones or whales, researchers rely on acoustic signaling. But devices that generate and send sound usually require batteries—bulky, short-lived batteries that need regular changing. Could we do […]