question

A spider’s web is built like a bicycle wheel, with an outer rim and spokes running to the centre, and then a spiral from the centre back out to the rim. The spiral is the only bit that is coated with glue – the spokes and outer rim are made from dry silk. The spider mostly avoids the sticky sections as it moves and it has very minimal contact with the web, in any case. On top of this, spiders constantly groom their legs to keep them clear of silk and glue.