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Thanks zaim, that's a great explanation and certainly helps to put the current position into in overall perspective. There's a long way to go then.

How many collisions are they aiming for to have enough to do their science? Have they got a target number? I can't find on any of the sites how many collisions they think will be enough. ATLAS is up to nearly 4 billion collisions - but how much does this mean against their target number? Maybe they ...