
Why Every World Map Distorts Something
Every flat world map makes trade-offs in area, shape, distance or direction. Learn how projections work and how to choose a map that fits the question you are asking.
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Every flat world map makes trade-offs in area, shape, distance or direction. Learn how projections work and how to choose a map that fits the question you are asking.

Moon phases show our changing view of the Moon’s sunlit half. Follow waxing and waning, understand quarter phases and separate the monthly cycle from a lunar eclipse.

How to gather useful information, contact the right local service and help a lost dog without assuming that every wandering animal has been abandoned.