Perhaps its the death instinct in me, but I'm drawn toward scenarios of impending doom. My favourite until recently was the melting Siberian permafrost releasing billions of tons of methane into the atmosphere with, as usual, unknown consequences.
How much do scientists really know? They can be paid to prove anything. Or at least produce research that indicates anything.
Today I read in the Telegraph that in ten days time the worlds largest ever non-military experiment will commence, somewhere on the Swiss-French border, which is designed to replicate the conditions which existed seconds after the big bang. Its called a Large Hadron Collider, and is costing £4.4 billion. My initial thought was "sounds a bit like half-life". But it could be worse than that, according to Otto Rossler, who says the proton collisions caused by this machine could create "mini black holes" which could destroy the earth. CERN say its perfectly safe, don't worry.
Sometimes it seems to me we're balancing on the edge of a precipice, daring it to swallow us up. No-one is in charge. We, as a species, collectively, want to die.