Geckos are lizards that dwell in warm climates. A fascinating characteristic of Geckos is their ability walk up smooth vertical surfaces. They can even walk across ceilings. They do this not with sticky feet, but with special toe pads that make use of an attractive force in nature known as the van der Waals force. In some regions they often make their way into human homes where they are usually welcome because they eat unwanted insects such as mosquitoes.
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