Dr Chris Smith and the Naked Scientist team present the latest science news, analysis and breakthroughs, In this week's episode...did the black death really kill so many in Europe that if left an indelible mark in the population’s DNA? New research suggests that might be a myth. Also could smaller wine measures in pubs help to tackle our unhealthy relationship with alcohol and later on, the Cambridge engineers who are using science to plug the gaps in the UK pot-holed roads. Plus we continue our Titans of Science series, this week featuring the cosmologist, astrophysicist and member of the House of Lords, Martin Rees. Get the podcast from the BBC Sounds app.