Ranganathan Gregoire Yogeshwar (born 18 May 1959[citation needed]) is a Luxembourgish physicist and science journalist based in Germany.

Growing up, he spoke Luxembourgish, German, French, English, Tamil, Kannada, Hindi and Malayalam (the latter three to communicate with his housekeeper, teacher, and gardener, respectively).

[4] He worked at the Swiss Institute for Nuclear Research (SIN), at CERN, both in Switzerland and at the Forschungszentrum Jülich in Germany.

[citation needed] During a stay in India in 1985, he led a series of seminars and conferences, including one at the Indian Institute of Science in Bangalore.

[citation needed] Yogeshwar began to work with Jean Pütz at the Westdeutscher Rundfunk (WDR) in Cologne in 1987 as science editor.