Department of Physics and Physical Oceanography Colloquium “Exploring the Subatomic World – How and Why” Dr. Allena Opper Department of Physics, The George Washington University Hundreds of years before the Common Era, philosophers in India and Greece developed the concept that all of matter was formed from indivisible building blocks, which they called atoms. While the concept of building everything from basic fundamental units is overwhelmingly supported by data, the ancient philosophers had identified the wrong unit. We now know that atoms are made up of neutrons, protons, and electrons – and surprisingly, neutrons and protons are not even the most basic building blocks of matter. This talk will discuss how the subatomic realm is explored and why scientists want to know more about it. Thursday, April 18, 2013 7:00 PM DeLoach Hall, Room 212