How stick insects honed friction to grip without sticking
When they're not hanging upside down, stick insects don't need to stick. In fact, when moving upright, sticking would be a hindrance: so much extra effort required to 'unstick' again with every step.
Latest research from Cambridge's Department of Zoology shows that stick insects have specialised pads on their legs designed to produce large amounts of friction with very little pressure. When upright, stick insects aren't sticking at all, but harnessing powerful friction to ensure they grip firmly without the need to unglue themselves from the ground when they move. ...



