Dear friend of Arkadia,   You are heartily welcome to  “The Dark Universe: What is Dark Matter?” by Dr. Rose Lerner on Thursday 28.7 at 6pm. Dark matter is ‘stuff’ that we cannot see and haven’t directly detected in any experiment. Scientists believe that it makes up about a quarter of the Universe today. (Most of the remainder is dark energy, which we know even less about.) The stuff that we are familiar with (atoms, light, humans, planets, stars, galaxies…) is only a small fraction (4%) of the Universe. In this talk Rose will present and explain some of the evidence which leads scientists to believe that most of the Universe is ‘dark’. Then she will discuss some of the theories for what dark matter might actually be and finally explain some of experiments which should help us to understand dark matter better. In brief, she will try to answer: Why do we think dark matter exists? What could dark matter be? How (and when) might we actually detect dark matter?  Rose hopes you will leave with more questions than when you arrived . You are welcome to ask some of these questions during and after the talk! The talk, in English, will be about 45 minutes and is aimed at the true non-scientist (who hasn’t studied science and doesn’t read popular science books) – although anyone is of course welcome to attend. Dr. Rose Lerner works as a researcher at Helsinki University and Helsinki Institute of Physics and has previously studied in Oxford(UK) and Lancaster (UK). Her work is on theoretical cosmology, particularly trying to link particle physics and cosmology.  Welcome!  Warm regards, Ian www.arkadiabookshop.fi Entrance is free and green tea will be served. A donation of €2 (or more!) is suggested and would be welcome!