The Greeks were the first to discover electricity around 2500 years ago when they noticed that rubbing amber with other materials would cause it to attract lightweight objects like leaves or cloth. They called amber "electron" which is where the modern words "electric" and "electricity" come from. Electricity can be dangerous for humans and cause harm if safety precautions are not followed. It is important to understand basic electrical safety and never perform any electrical work without proper training and protective equipment. Some key safety tips include keeping water and tools away from electricity, wearing protective gloves and boots near electrical components, using the proper fuse size, and knowing where your home's electrical panel and breakers are located.