Markus Aspelmeyer is a senior researcher at the Institute for Quantum Optics and Quantum Information (IQOQI) of the Austrian Academy of Sciences. His investigations have focused on quantum optics and quantum entanglement. He studied physics at the Ludwig Maximilian University of Munich (LMU) then went on to study philosophy at the Jesuit-founded Munich School of Philosophy. He took a bachelor’s degree in philosophy at the Munich School in 2002, the same year he also earned his Ph.D. in physics at LMU. After a post-doctoral fellowship with Anton Zeilinger at the University of Vienna, he became Dr. Zeilinger’s assistant. He was appointed a junior researcher at IQOQI in 2006 and named to his present position the next year. His current investigations probe quantum effects in massive mechanical systems, thought to be describable in terms of classical physics, and open up a new arena for studying the diffuse “border” between classical and quantum worlds. The winner in 2007 of the Fresnel Prize of the European Physical Society and the Ignaz L. Lieben Prize of the Austrian Academy of Sciences, he was awarded the Fritz Kohlrausch Prize of the Austrian Physical Society and the START Prize of the Austrian Ministry of Science in 2008. In addition to some forty papers published in leading science journals, Dr. Aspelmeyer is the co-editor (with Keith Schwab) of Mechanical Systems at the Quantum Limit, which was published as a special issue of the New Journal of Physics last year.