Do you know Lewis Madison Terman? Hardly likely. But of course you know Johann Wolfgang von Goethe. The man left a lasting impression. Terman too approved him special class. He, the authoritative developer of the first intelligence test and the creator of the term "intelligence quotient, " praised the Frankfurt champion for an IQ of 210, far from what we achieved in tests (population average: 100). Since the days of Terman - he became a professor at Stanford University in California in 1910 - intelligence research has evolved considerably. With surprising findings: So the invention of cooking apparently plays a central role in the rapid increase in the brain mass of our ancestors. Everything else on page 30. The sexual attraction was and is an important stimulus for human intelligence. "Using our brains as advertising surfaces for our fitness, we discovered entirely new types of fitness indicators such as generosity and creativity, " says Geoffrey F. Miller of the University of New Mexico, Albuquerque. The 20-page title story of this issue will surely captivate every reader, if only because we humans like to hear about what distinguishes us from other beings: intelligence. That's why you've long since understood the title of this text and know that in the number row instead of the question mark an "8" should be. Intelligence is a fascination - and a key to professional success. This is evidenced by a broad study by American psychologists of 32, 000 workers in 500 occupations. That's why it's still far from being a guarantee of success. Some people with a high IQ and a good exam have great difficulties gaining a foothold in their professional lives or even having a partner, as the story of Ulrike shows ("Unter Gleichhirnigen, " pages 46/47).