Prof. Dr. Tiberiu Harko is a scientific researcher in the Department of Physics at Babeș-Bolyai University, Cluj-Napoca, Romania. He obtained his Ph.D. degree in theoretical astrophysics from the University of Hong Kong, moved to Sun Yat Sen University in Guangzhou, and also held an honorary research associate position in the Department of Mathematics at the University College London, UK. Prof. Harko’s fields of research are gravitational physics, cosmology, and astrophysics, with his main interest centered on modified theories of gravity.