Just this morning, I was just listening to NPR's Planet Money: What's A Penny Worth? and wondering about this problem. http://www.npr.org/blogs/money/2014/05/16

Just this morning, I was just listening to NPR's Planet Money: What's A Penny Worth? and wondering about this problem. http://www.npr.org/blogs/money/2014/05/16/312732409/episode-539-whats-a-penny-worth http://www.npr.org/blogs/money/2014/05/16/312732409/episode-...