Tiny hairs on a gecko's foot allow it to cling to walls. In 2008, scientists created surgical tape based on gecko feet to help hold wounds together. Find out more in Medical Technology, a title in the Designed by Natureseries. Designed by Nature is a series of AV2 media enhanced books. A unique book code printed on page 2 unlocks multimedia content. These books come alive with video, audio, weblinks, slideshows, activities, hands-on experiments, and much more.