The most touching tribute to a dog I ever saw is at the home of America’s only Nobel Prize-winning playwright, who also won four Pulitzers, Eugene O'Neill.

Alaska is a big state (twice the size of Texas) with 19 National Park System units, eight of which are national parks. So how about a quiz focused on these eight parks? How many of you have traveled to any or all of them, and just how much do you really know? Test your knowledge with these 10 quiz questions. You might learn something from the questions as well as the trivia.

Geologists can use cosmic rays from outer space to piece together the timing of past geologic events, like volcanic eruptions and glaciations. But how does this work? It turns out that rocks, like humans, can get a sunburn!

Measurements from recent mountaineering trips indicate Mount Rainier's summit has shrunk since 1998.