Ivan (Janez) Regen (known also as Johann Regen) (December 9, 1868 – July 27, 1947) was a Slovenian biologist, best known for his studies in the field of bioacoustics.
Radio Regen is a charity based in Manchester, UK, that provides training in community radio.
Rain is liquid water in the form of droplets that have condensed from atmospheric water vapor and then becomes heavy enough to fall under gravity.
Rain (Regen) is a 1929 Dutch short documentary film directed by Mannus Franken and Joris Ivens.
Regen is a town in Bavaria, Germany, and the district town of the district of Regen.
Regen is a ''Landkreis'' (district) in Bavaria, Germany.
The Regen is a river in Bavaria, Germany, and a left tributary of the Danube, at Regensburg, Germany.
Regen is a not-for-profit organisation which promotes renewable energy and energy efficiency across the UK.