there are spiders all around the world. Scientists think there are about 40000 spider species on Earth. Many people find these small creatures very scary, and want to stay away form them, buy others find the webs they make beautiful.
A spiders know exactly what is happening at the center of its web. It keeps one foot on a thread that goes all the way to the center. When an insect moves on the web, the spider can sense the movements. It realizes its dinner ha arrived. When the spider isn't hungry, it keeps the insect in silk, to eat later.
An egg cause protects spider egg until the babies come out