Mr.Woodward's calamity project By donoman Feb 16, 1020 Avicenna's The Canon of Medicine Feb 16, 1121 Al-Khazini variation of gravitation and gravitational potential energy Feb 16, 1543 Copernicus heliocentric model Feb 16, 1609 Johannes Kepler first two laws of planetary motion Feb 16, 1628 William Harvey Blood circulation Feb 16, 1665 Robert hooke discovers the cell Feb 16, 1668 Francesco Redi disproved idea of spontaneous generation Feb 16, 1761 Mikhail Lomonosov discovery of the atmosphere of Venus Feb 16, 1789 Antoine Lavoisier basis for chemistry, and the beginning of modern chemistry Feb 16, 1805 John dalton's atomic theory Feb 16, 1838 Matthias Schleiden all plants are made of cells Feb 16, 1846 Johann Gottfried Galle and Heinrich Louis d'Arrest discovery of Neptune Feb 16, 1859 Gregor Mendel Mendel's laws of inheritance, basis for genetics Feb 16, 1890 Radioactivity Feb 16, 1897 The Electron