Suppose I want to play a 10-people outdoor ultimate frisbee game at night, with no power outlets available at the field. I expect it to last no more than 2 hours. What kind of portable power supply ...
What if it's night and you want to find north? How do you locate the North Star in the night sky?
How to learn to find north using moon phases? I'm looking for easy-to-remember rule of thumb, at best some simple graphic. It's quite trivial by full moon. Since full moon is in direct opposition to ...
I was geocaching a bit and I've found in many caches the warning not to cache in the night during the winter because of hunting season. My question is, have such limitations a legal basis, and if so, ...