Arachne was very famous for her skills. So talented that everyone would go to watch her, and occasionally she would make things that other people requested. One day she said she was even better than the Greek God Athena herself.
Athena soon heard about this. Athena came down to Earth and challenged her. It lasted for hours. They were both excellent but of course Athena won.
Athena then put a curse on her. Arachne would be turned into a spider. and weave things her whole life. This is we where we get the word arachnophobia and any other words relating to spiders.