Martin spent the evening and slept at my place, we carried out a nice talk, he is really experienced in scientific stuff, it is his specially :) , he is very polite and easy going ... i diffidently recommend him ... you should meet this scientist if you are a physicist or interested in space missions, ... he brought a bar of chocolate from his country to say thank you, that was nice behaviour, ... oh by the way, this multicultural guy has enough experience to treat you the way you deserve and enough languages to talk to you in a language that you know wherever you are from if you speak something widely known >>> hope to meet him once in Hamburg or in Czech republic .