Gesamtlänge aller Episoden: 12 days 14 hours 58 minutes
Four recent deaths in the UK have been linked to a batch of 'Superman' ecstasy pills. Should public facilities for testing drugs without fear of prosecution be made available?
Are safety measures adequate in the burgeoning field of synthetic biology – which involves the creation of novel biological systems – in particular among amateur enthusiasts?
We speak to researchers working in the Arctic, Antarctic, Greenland, Sudan, South Africa and the Indian Ocean to find out what they will do on Christmas Day far away from home. Plus, Ian Sample, Nicola Davis and Robin McKie review the year's best science stories
Former astronaut Chris Hadfield describes the thrill of rocket launches and spacewalks, and explains why he thinks it's too soon to send people to Mars
Roberto Mangabeira Unger argues that cosmology has wandered far from the disciplines of conventional science in its obsession with untestable speculations
Is our universe just one of an unimaginably large number of parallel universes? Prof David Wallace from the University of Oxford and Dr Roberto Trotta of Imperial College, London, summarise the dizzying permutations and implications
What do the latest studies into sexual orientation reveal? Plus, can we win the fight against Ebola in West Africa, and what threat does the virus really pose to people in Europe and the US?
Professor Steve Rayner delivers the 2014 Sense About Science lecture, 'Science, Technology and Democracy: Dissecting the Anatomies of Controversy'
Have we been going about tackling climate change in completely the wrong way? This year's Sense About Science lecture proposed an alternative strategy
Which is the best popular science book of the year? Robin McKie and Nicky Clayton discuss the six shortlisted. Plus, Rosetta's moment in space and Cern gets its new leader