Why is it colder at the top of a mountain than it is at sea level? Heat rises, and the top of a mountain is closer to the sun -- shouldn't it be hotter at the top of a mountain?
We humans have figured out a lot of strange ways to measure the weather. A cricket's chirps can tell us the temperature. The open scales on a pinecone signal a dry spell. But can a ring around the moon really predict rainy days ahead?