Tweeting into history
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Around 50 million tweets a day going back to March 2006. You work it out.
One of the big problems for journalists these days is sifting through the huge volume of material available.
Imagine the workload of historians of the future.
The library announced the news (how else?) on Twitter. It cites President Obama's tweet that he'd won the election as history in the making.
So it's competition time: no prizes beyond a warm feeling of your own cleverness.
How would past historical events have been tweeted by participants and observers in under 140 characters?
I’m Mark Mardell, the Â鶹¹ÙÍøÊ×Ò³Èë¿Ú's North America editor. These are my reflections on American politics, some thoughts on being a Brit living in the USA, and who knows what else? My 
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