TIMELINE By ochoa_acm 30,000 BCE Bow and arrows 5000 BCE The wheel is invented 2500 BCE Abacus 100 Paper 1590 Janssen microscope 1804 Steam locomotive 1879 Radio.Tesla 1893 Diesel engine 1928 Peniciline 1960 Laser 1977 Personal computer 1990 Launch of Hubble Space Telescope 1999 WI-FI networks 2009 Kepler Space Observatory, designed for discovery of exoplanets
