How do you ensure that a flash of inspiration does not end up burning you? How far can you actually go before you go over the edge? And how can you give even castles in the air a solid foundation? These are questions for which we have 21 rock-solid answers. In German, English, Spanish, and, if you want, even in legalese. 21 strong personalities with a weakness for good questions.

Dr. Johannes Ahme

The best number? For me, it has to be Euler’s number e, because the exponential function ex  based on it is of outstanding importance for describing temporal developments in physics, electrical engineering, and many other scientific and technical disciplines.

Martin D. Jacob

What is a good idea? A good idea is simple in essence. But a really good idea is when you know how to put it into action.