Welcome in the New Year with the Guardian's science team as they ask what we can be optimistic about in 2007. Thinkers such as the Darwinian philosopher Dan Dennett and psychologist Steven Pinker are looking forward respectively to the end of religion and war in 2007 - or at least, the beginning of the end. Hear more predictions from web guru and editor of Edge  magazine John Brockman.
The UK's new science minister has revived interest in potentially sending a British man or woman into space, something that has been off the political radar for a generation. Host Alok Jha asks space doctor and would-be astronaut Kevin Fong why now is the time for Britain to join the space race.
Madonna wants to "neutralise radiation" and Cherie Blair's lifestyle guru Carol Caplin advises "unclogging" the lymph system to avoid breast cancer. We talk to science author Simon Singh about the damage pseudo-scientific claims from celebrities can do.
And finally, regular podders Ian Sample and James Randerson welcome Simon Raynor from London Zoo to discuss whether animals can really be gay. And check out bonus New Year