Greeks observed static electricity around 600 BCE. William Gilbert coined term "electricus" in 1600
Microwave oven discovered by Percy Spencer while working on magnetrons. Post-it notes created by 3M scientist Dr. Spencer Silver. X-ray machine invented by Wilhelm Conrad Rontgen in 1895. Super glue developed by Harry Coover in 1942. Implantable pacemaker created by Wilson Greatbatch in 1956
Ancient Greeks and Egyptians documented electric effects of fish. Thales discovered gravitational force from amber friction in 600 BC. Benjamin Franklin discovered electricity contains both positive and negative charges