Etymology and Origin
The word "periscian" originates from the Greek words "peri" (around) and "skia" (shadow).
Meaning
A periscian is a person who lives in a region where, during the course of a year, the sun passes directly overhead at least once.
Explanation
The concept of periscians is based on the Earth's axial tilt. Regions near the equator experience a near-vertical sun twice a year, when the sun is directly overhead. These regions are known as periscian zones.
People living within these zones cast a shadow that falls in all directions at different times of the year, hence the name "periscian" (around-shadow). This is in contrast to antiscians (opposite-shadow), who live in the Northern and Southern Hemispheres and have shadows that always fall in opposite directions.
Regions with Periscian Zones
Periscian zones occur along the equator and extend varying distances north and south, depending on the Earth's axial tilt. These zones include:
Within these regions, people may be periscian for part or all of the year, depending on their latitude and the time of year.
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