5 Live Science Podcast

Dr Chris and the Naked Scientists with a closer look at some of this week's science stories including; a trigger to regrow heart cells and the prophylactic effects of having children.

Dr Chris, the Naked Scientist stands in for Dr Rhod tonight and fields questions about norovirus, why humans have rhesus positive and negative blood and wandering giant planets.

Bacteria on the teeth, the age of the Sun and what's it called when you're on a train and another train moves and you think it's your train that's moving? Dr Karl and Dr Rhod wrestle with your science queries. You can send your questions to UpAllNight@bbc.co.uk anytime, just put Dr Karl in the subject line.

Dr Karl joins Dr Rhod to discuss different approaches to CPR and emergency medicine, how 4G does what it does and why so few acorns this autumn?

A molecular whodunit involving MRSA, gene therapy for epilepsy, and whether women synchronise their menstrual cycles are all on the billing this week.

As Chinese communist party prepares to unveil its new leaders Dr Karl discusses the discovery of the new roaming planet with no star of its own to orbit, and we find out if gravity travels at the speed of light.

Dr Chris and colleagues with weeks science news, a close look at ash dieback disease and the truth about autophagia.

Dr Karl takes questions on bacterial infections, trauma medicine and HIV.

In this edition: in 2010, the USA used 98 quadrillion British Thermal Units (BTUs) of energy - about 20% of the world's total. About 40% of that went into buildings. How this could be easily and hugely improved without loss of comfort. Why both men and women, wearing revealing attire are perceived as more sensitive, but less competent . And Brain freeze finally explained - almost

The Naked Scientists join Dotun to explain the new theories on the formation of the Moon and we meet the stand up mathematician who's currently on tour around the UK.