AllNews'Bulgarian Marathon Runner' - 1 News Result(s)Why A Bulgarian Ultra-Marathon Runner Shut Himself In A Glass BoxWorld News | Reuters | Sunday April 30, 2023 Bulgarian ultra-marathon runner, Krasse Gueorguiev, will live in a glass box for 15 days in a park in Sofia. www.ndtv.com'Bulgarian Marathon Runner' - 1 News Result(s)Why A Bulgarian Ultra-Marathon Runner Shut Himself In A Glass BoxWorld News | Reuters | Sunday April 30, 2023 Bulgarian ultra-marathon runner, Krasse Gueorguiev, will live in a glass box for 15 days in a park in Sofia. www.ndtv.comYour search did not match any documentsA few suggestionsMake sure all words are spelled correctlyTry different keywordsTry more general keywordsCheck the NDTV Archives:https://archives.ndtv.com