Brownian motion -------------------- This was Einstein the first major paper submitted to Annalen der Physik by Einstein. This wasnt something new, a french mathematician had already propsed a mathematical model for this motion, (media has hyped it making Einstein the first one to propose this model, which is not true.) French guy's theory is still widely known and used in many financial way. Now, first of all, what is Brownian motion? Brownian motion is a random motion caused by tiny particles when it is supspended in liquid or gas. The first to experiment with this motion was botanist, Robert Brown. Then the second to give it the theory was the French guy, Louis Bachelie. Now the most important thing that Einstein did with this motion was he took the kinetic thoery of fluids (which was very controversial at that time) and predicted that molecules of fluids wud move at random ,and with it the particles creating a random movement. Now what was amzing was, this prediction precisly solved the Brown's Puzzle! This is a very broad mathematical theory. With help of his theory Einstein also helped solve the mystery of atom. It was amazing till 1905 even Chemist who relied on Periodic table questioned the reality of atom but many scientits are beilived to be convinced after reading Einstein's paper. ---------------------------------------------------------------------------------------------- zalim and aliciaa, it is good to find freinds in sajha sharing such interest. Yes, you know the joke they say abt string theorits, it goes, Either you are Physicts or a string theorist. String theory is different is every perspective, but so was Einstein theory of Relativity(atleast in many things), but as Nature (esclipse) helped him prove he was right, maybe same thing will happen to String theory. Around the world, many labs have opned up to test this theory, i think on Switzerland, they are building world's largest atom Smasher to help solve this puzzle.