CERN Could be Dangerous
Some questions are so hard to answer that we have to really think about them (Anne Strieber reads her paper about this for subscribers this week). For instance, if time travel exists, why can’t we go back in time and kill our grandparents (which means we would never have been born)? The principle of least action means that could never happen, because nature always takes the simplest and shortest route to the solution of any problem, meaning that no effort toassassinate an ancestor can succeed if it would mean thatyou could not exist. Scientists think that this principle is what will protect us from dangerous repercussions from the CERN collider as well.
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