Well, what a surprise! Today is penguin awareness day, and we weren't even aware of it. Why should we be aware of penguins? Some people think that they are bellwethers of climate change, and that if Adelie penguin numbers continue to decline, humans need to worry. So it's not just that they are cute, or even that they are amazingly well-adapted to live in harsh environments. It's that they have thrived for thousands of years, and our planet can't be in good shape if their numbers are declining.