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@Ned
I work for the Institute of Physics and we had to issue a press release earlier in the week to assure people that the world would not end! Made BBC breakfast news (for what that's worth) and also the Guardian which is quite exciting for us! Needed Steven Hawkins this morning to enforce the point! Basically the force of a collision is about the same as two gnats running into each other! If that's enough to create a black hole we are all doomed! :-)