Team Unexpected have been digging into their mind palaces to pull on the scientific research that has stuck with them most over the past year. We hear from Professor John Parnell, geologist at the University of Aberdeen, about the role of plankton in forming ancient mountains. How ocean bubbles play a role in climate regulation with bubble physicist Dr Helen Czerski from University College London. Would you know how to measure the size of a bubble? We also participate in some memory sports with Jonas von Essen who is a two-time world memory champion. He helps us construct a mind palace in order to memorise really long strings of digits. Plus we look into the backstory of the human buttocks with science journalist and reporter Heather Radke. She answers the question ‘why do we humans have such large behinds?’ And we hear from Professor Andre Isaacs at the College of the Holy Cross who has filled his chemistry lab with music and dance in order to change perceptions about who can be a scientist. That, plus many more Unexpected Elements.  Presenter: Marnie Chesterton Producer: Jonathan Blackwell and Harrison Lewis with Imaan Moin and Alice Lipscombe-Southwell