One portion of the Nile River flows for a thousand miles with a fall of only one foot. Parts of…
Rivers run down to sea-level finding the easiest course, North, South, East, West and all other intermediary directions over the…
The natural physics of water is to find and maintain its level. If Earth were a giant sphere tilted, wobbling…
The horizon always rises to the eye level of the observer as altitude is gained, so you never have to…
The horizon always appears perfectly flat 360 degrees around the observer regardless of altitude. All amateur balloon, rocket, plane and…