Science & Technology Timeline By hafizise Apr 30, 1687 Newton provides the foundations of physics and writes "Principia" Apr 30, 1708 Jethro Tull's mechanical seed sower Apr 30, 1793 Eli Whitney develops his cotton gin A device to clean raw cotton Apr 30, 1799 Humphry Davy discovers nitrous oxide Laughing gas and the first effectve anesthetic Apr 30, 1843 Typewriter invented. Nov 24, 1859 Charles Darwin writes "The Origin of Species" Dec 27, 1869 Mendeléev produces the Periodic Table. Mar 6, 1899 Aspirin invented Jul 21, 1969 Neil Armstrong sets foot on the moon.
