Staircase Tutorial, Andreas Leversa (https://creativecommons.org/licenses/by/2.0/)
Sandbox, Kate Mereand-Sinha (https://creativecommons.org/licenses/by/2.0/)
Panama canal construction photo, World Bank Photo Collection (https://creativecommons.org/licenses/by-nc-nd/2.0/)
Other pictures used by permissions of Florian Weingarten
Flight of the Unicorns, Eric Wagner (https://creativecommons.org/licenses/by-nc-sa/2.0/)
Container, Izabela Reimers (https://creativecommons.org/licenses/by-nc-sa/2.0/)
Sam Satch, Chinese Ornamental Chilli Sprouting (https://creativecommons.org/licenses/by-nd/2.0/)
Anvil & Hammer, Brad Knabel (https://creativecommons.org/licenses/by-nc-nd/2.0/)
Matt Kowal, DIY Darkroom - Alternative Process (https://creativecommons.org/licenses/by-sa/2.0/)
Over-stuffed Walrus picture kindly provided with permission by the Horniman Museum and Gardens, U.K.
Video of me in walrus costume, Lily Rogers and Emma Craig