Whale sharks can dive more than a mile deep. Marine biologists are still trying to figure out why they bother.

Summers in Alaska’s Denali National Park and Preserve are short seasons, followed by even shorter (yet colorful) autumns, then long, cold winters.

We humans are drawn to the shoreline, to live and to play. Some of us have even found a home in the waves, riding on gentle swells or braving roaring mountains of seawater.