For the first time, scientists from the Technical University of Munich (TUM) and the Max Planck Institute for Plasma Physics (IPP) have succeeded in losslessly guiding positrons, the antiparticles of electrons, into a magnetic field trap. This is an important step toward creating a matter-antimatter plasma of electrons and positrons like the plasmas believed to occur near neutron stars and black holes. In an interview, Dr. Eve Stenson presents her research work.