In this edition: We revisit summer expeditions into the caves of Slovenia, along the Silk Road and at Everest base camp.

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News: Surrey quakes and Antarctic archives – We review research that concludes oil drilling was not responsible for earthquakes in Surrey, and hear how restored data from the 1970s is providing a new look at Antarctic ice melt.

Adventures with the caving club – Journey deep into a Slovenian mountain with the Imperial College Caving Club, squeezing through narrow passages and discovering new caverns.

Cycling the Silk Road – A team of medical students regale us with tales of their adventures cycling through Asia – from chin stitches to mafia weddings.

Experiments on Everest – Would you spend three months at Everest base camp in the name of science? We talk to Dr Liesl Wandrag, who did just that to find out the impact of low oxygen on critically ill patients back at sea level.

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The podcast is presented by Gareth Mitchell, a lecturer on Imperial's MSc Science Communication course and the presenter of Click Radio on the BBC World Service, with contributions from our roving reporters in the Research Communications group.