Tarantulas use 'silky slippers' to anchor to slippery surfaces
16 May 2011 Last updated at 17:59 BST
It is a question scientists have long wanted to answer, why is it that large and heavy spiders like tarantulas are able to anchor themselves to slippery vertical surfaces without falling?
A team from Newcastle University have found the answer and the discovery helps explain how spiders first evolved their silk-spinning abilities.
Victoria Gill reports.