Answering questions is not all that difficult if you know what you don't know. Once Metacognative--knowing what you don't know--questions can be formed and answers can be found. Discovering what you don't know--Non Metacognitive--is the hard part of learning. Just as the Eskimo looks at the ivory to see what waits for discovery, I love lurking on the internet to see what is waiting for discovery, but peering into the hole is like looking into another dimension. Once the peering begins, all sense of time is lost. I am listing such places on this page. Those who dare to pursue these avenues may lose hours of their life. Beware!