Vince Beiser is an award-winning journalist and author of “The World in a Grain: The Story of Sand and How It Transformed Civilization.” The book has been translated into five languages, was a finalist for a PEN America award and a California Book Award, and spawned a TED talk.

Carly Lewis has been a freelance journalist since 2012. Her work has appeared at The New York Times, Wired, the Globe and Mail, New York Magazine, Elle, The Walrus, Maisonneuve, The Atlantic, Hazlitt, The Guardian and Maclean’s, where she is a contributing editor.