Scientists in China are trialling stitches that stimulate healing using electrical charge. So, how does this new technology work? And how soon might we see something like this on the market?

Also this week, the Nobel Prizes in Medicine, Physics and Chemistry were all announced. And there was something of an AI theme to the award winners.

Guest: Dr Jonathan Webb, ABC Science Editor

Brainteaser (answer in the audio):Jo is walking through a train tunnel. A quarter of the way in, she hears a train whistle behind her.If she sprints forward or backward at her maximum speed of 20kph, she'll escape from the tunnel just in time to avoid the train.How fast is the train moving?For more of the latest science news, look for the science section on the ABC News website and sign up to a weekly email newsletter.