Take pity on your grader, who is facing a huge stack of exams and would likely prefer shoveling coal to wading through the paper pile.

So instead of a pile of 16 cards all facing the same way, you will have a pile with 12 cards facing one way, and the four aces facing the other.

He said that all of these things can pile the stress on birds, which are already facing threats from hunting, oil spills, wind farms and other factors.