Example image of eyePlorer eyePlorer map for 'Gunnar Nordström': Finland General relativity Gravitation Helsinki Docent Helsinki University of Technology Leiden Paul Ehrenfest University of Helsinki Electromagnetism Kaluza–Klein theory String theory Hans Reissner Reissner–Nordström metric Radioactive decay Nordström's theory of gravitation Timeline of black hole physics 1910 in science Contributors to general relativity Charged black hole 1918 in science Scalar theories of gravitation List of physicists Theory of everything List of Finns Nordstrom (disambiguation) Classical theories of gravitation March 12 Albert Einstein