There's a reason lottery jackpots have been swelling in recent years
                                
                                
                                    (Newser) -
                                    If it seems like lottery jackpots are getting larger and larger, it's because they are. Friday night's Mega Millions grand prize has hit a staggering $1 billion, continuing a trend of giant jackpots. It's the second-largest lottery prize in US history and joins five other top 10...