- Bulgaria and Denmark were the only European countries to save their Jews during the Holocaust.
- The Bulgarian Army is the only force in the world which has never lost a single flag
- The first air-dropped bomb in military history (used on 16 October 1912) was developed by the Bulgarian Air Force during the First Balkan War
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.