Dry ice and soap in a kitty pool is pure backyard science fun. The dry ice makes thick rolling fog, and the soap traps it into bubbly foam that grows and spills over the edges. It looks like a cloud ...

It's amazing what a little fog or haze can do to spice up an image or video clip. But you don't have to rely on the bulky machines that need to be plugged into a wall. One of my favorite photography ...