The New Earth http://www.dailymail.co.uk/pages/live/articles/technology/technology.html?in_article_id=450467&in_page_id=1965 Interesting article. But something keeps bothering me. In stories like this you see quotations like this one often, that liquid water is a prerequisite for life to evolve. Why is that so? Now I am not an evolutionist, but: IF, man (and life itself) evolved through a series of random events then why do we assume that for life to evolve somewhere else it would follow the same pattern it has here on earth? Why is liquid water a prerequisite? Why would we assume that life somewhere else would follow the same carbon based form it has on earth. Why not silicon based? Why could life not evolve in seas of liquid methane instead of in liquid water? Or a pool of liquid iron for that matter?