Greatest Discoveries:
The Planets Move (2000 B.C. - 500 B.C.)
The Earth Moves (1543) Nicolaus Copernicus
Microorganisms (1674) Anton Van Leeuwenhoek, lens grinder
The Cell Nucleus (1831) Robert Brown
Oxygen (1770s)
The nature of elements (1770s) Antoine Lavoisier 
Atomic Theory (1808) John Dalton (English)
Continental Drift (1911) Alfred Wegener 
K-T Asteroid Theory of Dinosaur Extinction (1980) Walter Alvarez
Classification of Species (1735) Carl Linnaeus
Rules of Heredity (1850s) Gregor Mendel
Human Anatomy (1538) Andreas Vesalius
Genes Are Located on Chromosomes (1910 - 1920s) Thomas Hunt Morgan
DNA Is the Genetic Material (1928, 1944, 1952) Oswald Avery, Linus Pauling
DNA Is a Double Helix (1953) James Watson and Francis Crick
Blood Circulation (1628) William Harvey
The Law of Falling Bodies (1604) Galileo Galilei 
Universal Gravitation (1666) Isaac Newton
Laws of Motion (1687) Isaac Newton
The Second Law of Thermodynamics (1824 - 1850)
The Quantum Leap (1900 - 1935) Max Planck, Albert Einstein,
                            Werner Heisenberg and Erwin Schrodinger.
                            
Inventions:
Printing Press
Harnesing electricity
Fire 800,000 years ago
The wheel 4,000 BC
Written Language
Vaccines