Properties of Matter It had taken our species millions of years to build an airplane that flew like a bird. The historic flight of Wright brothers lifted into the air at Kitty Hawk, North Carolina, USA, on December 17, 1903, at 10:35 A.M. It was the first time a self–powered airplane, controlled by a human, had flown for any significant amount of time. Amazingly, however, once we had learned how exactly airplanes flew, it took us only fifty years to build a space craft. The credit goes to Daniel Bernoulli, whose seminal work in hydrodynamics enabled Zhukovsky and others to get us off the ground. Daniel Bernoulli's discovery also led to the invention of Sphygmomanometer, the painless, inflatable Blood pressure measuring device which we are familiar with, by an Italian doctor Scipione Riva – Rocci in 1896. The contributions of great scientists–Archimedes, Robert Boyle, Blaise Pascal, Leonardo da Vinci changed the world we live. Let's understand the laws that govern the behavior of matter in all its states – solids, liquids and gases and their effects on the environment.