Take a look at the Top 5 inventions of all time below.
#5: Optical Lenses (13th Century) Reflecting light through glass
#4: Semiconductor Electronics (Mid-20th Century) These became the building block for the modern industrial world
#3: Penicillin (1928)
#2: Electricity (Late 19th Century)
#1: The Printing Press (1430s)
