While studying genes of fruit flies at the Free University of Berlin in 1999, Karberg decided he'd rather be a fly on the lab wall as a journalist than to dissect any more insects. After due science journalism studies he was soon editor of the Berlin science radio show Die Profis. He has worked for the science section of the daily online newspaper Netzeitung and founded the science journalism network Schnittstelle. He spent the academic 2008/2009 year at MIT as a Knight Science Journalism Fellow. As a freelancer he has reported about the biotech business and life sciences not only from Germany but New Zealand, Asia and the US while occasionally weaving in his direct knowledge of genes (and flies). His articles have appeared in such newspapers and magazines as the Frankfurter Allgemeine Sonntagszeitung, the German version of the MIT Technology Review, bild der wissenschaft, brand eins and Cell.
For the Knight Tracker Karberg follows German language science journalism in Germany, Austria and Switzerland -- with no particular drive to find flies in the ointment.