Dr. Helen Scales is a marine biologist, writer, and public broadcaster. She's written several books including Spirals in Time: The Secret Life and Curious Afterlife of Seashells which is a Guardian bestseller, shortlisted for the Royal Society of Biology books prize and selected as book of the year by The Economist, Nature, The Times and Guardian as well as BBC Radio 4's Book of the Week. She has written for National Geographic, the Guardian, New Scientist, BBC Wildlife magazine and BBC Focus, among others, and also presents the Earth Unscrewed podcast. She's been a frequent guest on Brian Cox's Infinited Monkey Cage Podcast. Helen gives talks for schools, bookshops and science and literary festivals. She's also spoken at Google, the Royal Institue and has a Ted Talk called 'Stories from the Ocean'. She teaches marine biology and science writing at Cambridge University and is scientific advisor for the marine conservation charity Sea Changers.