This week on Science Weekly, presented by Ian Sample, the Guardian's Pascal Wyse meets science writer Michael Bond to explore the psychology of crowds and the tension between individual and group think. Michael's new book is called The Power of Others.

Ian is joined by Observer Tech Monthly commissioning editor Nicola Davis and Ewen Callaway from Nature magazine to discuss gravitational waves (now you see them, now you don't), why light and mouse brains are giving neuroscientists an insight into how memories are laid down in the brain, and the future of connected devices and our health.

Subscribe for free via iTunes to ensure every episode gets delivered. (Here is the non-iTunes URL feed).

Follow the podcast on our Science Weekly Twitter feed and receive updates on all breaking science news stories from Guardian Science.

Email scienceweeklypodcast@gmail.com.

Guardian Science is now on Facebook. You can also join our Science Weekly Facebook group.

We're always here when you need us. Listen back through our archive.