The space station is currently home to astronauts from the US, Russia and Japan.
5 April 2018 9:09 AM GMT
It's the latest advance in a growing field of sensors that can be swallowed or worn to monitor our health.
25 May 2018 2:52 PM GMT
The long-acting pill technology could also have a range of other applications.
17 Nov 2016 5:16 AM GMT