We've all woken up from a night out and not remembered getting home. How does the brain do that?  On this week's ep we look into the neuroscience of navigation and spatial awareness, a completely complicated task that we take for granted all the time. So listen in and get a new found appreciation of how great your brain is for not constantly walking you into walls. Expert guest: Christopher Kemp is an English scientist and science journalist. He works at Michigan State University, overseeing a research group that studies Parkinson's disease and other neurodegenerative diseases. He is the author of Floating Gold: A Natural (and Unnatural) History of Ambergris and The Lost Species: Great Expeditions in the Collections of Natural History Museums and his latest book "Dark & Magical Places: The Neuroscience of How We Navigate" Comedy guest:  Si Deaves is a stand-up comedian from Southend-on-Sea, Essex and has previously been described as 'one of the greatest undiscovered acts in the country' - BFG Concerts and was also described by one of his comedy heroes as 'great and very original'. Deaves' exploration into the weird and wonderful things his mind does, serves as the perfect vehicle for him to exercise his dry, acerbic wit. Deaves is also the host of the Comedian's Tea Party Podcast. To learn more about Si and all his endeavours click here for a list of links to his various work.  ​