Holger Dambeck , born in 1969, studied physics and has been science editor at Spiegel Online since 2003 and head of the science and health desk since 2015. Already as a 16-year-old, he participated in mathematical Olympiads to solve tricky problems. Since 2006, he has been writing about the wondrous world of math in the Spiegel Online column Numerator . In 2003, he was awarded the media prize of the German Mathematical Society. Since 2014, he has been writing the Spiegel Online column “Rätsel der Woche” (“Riddle of the Week”).