They're used by humans for fossil fuel and in entertainment. They were not created by the human race, they were created through thousands of being underground and soft tissues quickly decompose leaving the hard bones or shells behind. Over time sediment builds over the top and hardens into rock.
Reliable should be the answer
The train or truck might get crashed or there might be a hole and because it is a part of an nuclear it is pretty much active and if there are house close to it something might happen if one of the answer that I told is right
The major league baseball team who won a world series on the night of a total lunar eclipse was Boston Red Sox at St. Louis Cardinals. It happened last October 27, 2004 and was visible to the fans with a good line of sight at Busch Memorial Stadium.