Bitcoin Fact #6#: Bitcoin blocks don't have to be timestamped in order. A block only needs a time later than the median of the 11 blocks before it and no more than 2 hours ahead of the checking node's clock, so it can show an earlier time than the block it builds on. #BitcoinFactOfTheDay#

Bitcoin Fact #5#: In August 2010, a bug let a single transaction create more than 184 billion bitcoin out of thin air. Developers shipped a fix within about five hours, and the corrected chain soon overtook the one holding the bad block. #BitcoinFactOfTheDay#