Space-station crew members just found an elusive air leak by watching tea leaves float in microgravity

The International Space Station has been leaking an unusual amount of air since September 2019. At first, crew members held off on troubleshooting the issue, since the leak wasn't major. But in August, the leak rate increased, prompting astronauts and cosmonauts on board the orbiting laboratory to start trying to locate its source in earnest. More

(Source: Business Insider - Oct 20)