Google has a new search puzzle called "A Google a Day".
You are given a clue and based on the information in the one clue you must solve the question posed. Google calls it a "trivia contest where Google is allowed".
It's not just some random bit of knowledge learning. Google a Day teaches you how to learn some baseline knowledge from the information in the clue and then build upon that knowledge to reach the final answer.
Can you solve today's question?
Give Google a Day a try.