Nikolai Semyonovich Kardashev (Russian: Никола́й Семёнович Кардашёв, romanized: Nikolay Semyonovich Kardashyov, IPA: [nʲɪkɐˈlaj sʲɪˈmʲɵnəvʲɪtɕ kərdɐˈʂof];...