Amazing fact about the invention of the lighter
The cigarette lighter was invented before the match.
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- What is magnetic declination?
“Magnetic declination is the angle between magnetic north and true north, and it varies depending on where you are on Earth.”
Reference: NOAA National Centers for Environmental Information
More from this shelf
Where was the compass invented?
The first compasses were made in ancient China from lodestone, a naturally magnetic rock, and were used for fortune-telling and feng shui before navigation.
What is a gyrocompass?
A gyrocompass, invented in the early 1900s, uses a spinning wheel to find true north and isn't affected by magnetism, which makes it useful on steel ships.