Petnica Science Center (pronounced [pɛ̌ːtnitsa]) (PSC) (Serbian: Истраживачка станица Петница, romanized: Istraživačka stanica Petnica) is an independent and nonprofit organization for extracurricular, formal and informal, science education located near Valjevo, Serbia. PSC has organized more than 3000 programs (seminars, workshops, research camps, conferences, etc.) since its opening, for nearly 50,000 students and science teachers in 15 disciplines of science, technology and humanities, with more than 7,000 lecturers.[1][2]