That same year, Einstein's dad died of sickness. Einstein finally decided to marry Mileva and he later secured a job at the Swiss patent office in Bern, as a patent examiner, his job for the next seven years. .
The year 1905 was a momentous year for science, for without any academic connections, Einstein published, at the age of 26, four papers in the journal Annalen der Physik. These four papers would alter the course of twentieth-century physics. The first paper dealt with the random thermal motions of molecules in colloidal solutions, called Brownian motion. This was first noted in 1827 by the English botanist Robert Brown. Einstein's second paper reinforced the quantum theory of light, developed by Max Planck in 1900. In it Einstein established the photon nature of light by accounting for the photoelectric phenomenon discovered in 1902. For this contribution, Einstein was awarded the Nobel Prize in physics in 1921. The third and most famous of Einstein's 1905 papers dealt with the special theory of relativity. The final paper of that year introduced the now famous equivalence between mass and energy in the equation E = mc2. Because of this work, Einstein received his first academic post in 1908 at the University of Bern.
After making success with his first theories, Einstein moved on to tackle greater problems, such as gravity. In 1907 he came up with a solution that stated that gravity and acceleration are the same. Then later in 1911 he found out that acceleration can bend light, and according to Einstein's theory, this meant that gravity could too. With these outstanding discoveries came a price and his marriage with Mileva was starting to deteriorate. He even started liking his own cousin, Elsa! In 1909 Einstein moved to Zurich where he received the position that he wanted, professor of physics at the University of Zurich, the ETH. .
In 1914, Einstein moved to Berlin with his wife Mileva and his two sons, Hans Albert and Eduard.
