It’s coffee break time at the packed event venue in the western German city of Duisburg. Participants sip hot beverages while discussing astrophysics and philosophical paradoxes. Before heading to a lecture on radioactivity or Korean writing, some manage to squeeze in a 1,000-piece puzzle. As you might have guessed, this isn’t just any ordinary conference. To be able to attend this annual meeting, you must have an IQ of at least 130. Besides excursions in the surrounding Ruhrgebiet area, Germany’s former industrial heartland, this year’s edition includes numerous lectures and workshops, includ…