Here are some one liners...
Fire in the Hole! Rock Blasting Is Now Reality - Boom! I offer a warning about taking advice from old encyclopedias and ancient copies of Popular Mechanics.
Spain Defaults on Its Debts and the Bank Makes Money -- It's a little complex, but I make an attempt to explain how the King of Spain can stop payment on his loan and the banks still make money.
Fire in the Hole! Rock Blasting Is Now RealitySome very brave men in Solvakia have figured out how to use gunpowder to break up the rock to make mining easier. Essentially, one drills a hole into the rock, and inserts a gunpowder packet with a long fuse. Then the hole is packed so that the blast will be contained within the rock rather than blow back out through the hole. Drilling a number of holes along line and setting off the charges simultaneously (or as close as possible) allows entire sections of rock to fall away in a controlled manner. (Don't try this at home, kids.) 
Spain Defaults on Its Debts and the Bank Makes MoneySpain has run out of money again. King Phillip the 4th has held back his payment to the Genoa banks. He is now living off of the payment he would have made, while he negotiates with the bankers to restructure the loan. This is hardly the first time this has happened. It is not a surprise and with the value of silver dropping due to inflation, Spain is being nibbled to death by ducks. It must be driving the King mad knowing that he owns the world's most massive silver mine and yet he can't make the nut on his debt, nor pay his troops regularly. But the King is getting wise to what is going on here. The bankers have been playing with the international money supply. 
This Year on Wikipedia
Year 1627, Wikipedia.