Monday coffee break: Gold diggers

In all of history, the total amount of gold humans have mined would fill:
A. two Olympic-size swimming pools
B. the Colusseum in Rome
C. the Grand Canyon

At Batu Hijau, a large-scale open-pit gold mine in eastern Indonesia, how long does it take to accumulate more tons of mining waste than than all of the tons of gold mined in human history?
A. sixteen hours
B. sixteen days
C. sixteen months

How much rock and ore must be extracted at Batu Hijau to produce the amount of gold (one ounce) in a typical wedding ring?
A. 250 tons
B. 250 pounds
C. 25 pounds

The answer to all three questions is: A.

Source: The Real Price of Gold, National Geographic, January 2009