... different factors is critical, and even small changes in one of them may easilyshift the system from one state to another.1.2 Themes of the Book The symposium From the Earth’s Core to Outer Space ... Stone from the Sun.I am grateful to all authors who, in addition to their official work, have foundtime to write the articles, and to the reviewers, who in most cases are other authorsof the ... Lehtodiscusses one of the basic questions of life: are we alone in the Universe, and if not,how could we observe life elsewhere?1.3 Epiloque The 2008 Symposium From the Earth’s Core to Outer Space was...