Arrow keys to switch between slides! From the first plane flight in 1903 to Dolly the Sheep, the first mammal clone, in 1996, the 20th century had a lot going on!
Image Credits: Wikipedia skeptism.org clipartkid.com (SOURCE NOT FOUND) coen.boisesfate.edu ideas.lego.com jalopnik.com jfklibrary.org biography.com dolly.roslin.ed.ac.by Sources: https://www.youtube.com/watch?v=Y8JEpj964IA&index=8&list=PL0ML7CQ2Aozi2jt0lIxaCqCgKY7y7Foq3 Google
