1. Gravity from Particle Amplitudes is a research group based at the Niels Bohr International Academy and affiliated with the Theoretical Particle Physics and Cosmology group at the Niels Bohr Institute, University of Copenhagen

2. In 1922 de Hevesy co-discovered (with Dirk Coster) the element hafnium (72Hf) (Latin Hafnia for "Copenhagen", the home town of Niels Bohr).

3. A television adaptation of Michael Frayn's celebrated and award-winning stage play about the meeting between physicists Niels Bohr and Werner Heisenberg in 1941 Copenhagen

4. He was an Adjunct Professor of geophysics and space physics 1996 to 2006 at the Niels Bohr Institute of University of Copenhagen and has authored over 140 research articles or books.

5. Complementarity principle, in physics, tenet that a complete knowledge of phenomena on atomic dimensions requires a description of both wave and particle properties. The principle was announced in 1928 by the Danish physicist Niels Bohr.