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Science & Tech

How Does GPS Actually Work? Explained Simply

How does GPS actually work? A plain-English guide to trilateration, why you need four satellites, and how Einstein's relativity keeps GPS from drifting kilometres off.

Justin
July 26, 2026

Recent Posts

What Is the Federal Reserve and What Does It Do? Explained Simply
Whenever inflation rises or the economy wobbles, one institution dominates the headlines: “the Fed.” It’s blamed and credited for almost everything, yet few people can say what it actually is or does. Here’s a clear, neutral explanation of the Federal Reserve — America’s central bank — and the powerful, blunt tool at its disposal. Key… Read more: What Is the Federal Reserve and What Does It Do? Explained Simply
Why Does Hollywood Make So Many Sequels and Remakes? Explained
Why does Hollywood make so many sequels and remakes? It's not a lack of ideas — it's risk. How huge budgets, built-in audiences and global marketing drive the trend.
How to Paint a Room Like a Pro: A Step-by-Step Guide
How to paint a room like a pro. A step-by-step guide covering prep, the right paint order (ceiling, walls, trim), cutting in, and the tricks for a flawless finish.
What Happened to Pompeii? The Eruption of Vesuvius Explained
What happened to Pompeii? How the eruption of Vesuvius buried the Roman city in 79 AD, why the victims weren't killed by lava, and how the famous body casts were made.
What Is Buy Now, Pay Later? How BNPL Really Works
What is Buy Now, Pay Later? How BNPL works, how the companies make money if it's interest-free, and the real risks — late fees, overspending and credit impact.
Why Am I Always Tired? Common Causes of Fatigue Explained
Why am I always tired? The common causes of fatigue — poor sleep quality, stress, diet and dehydration — plus the medical reasons and when to see a doctor.
How Do Smart Glasses Work? AR Wearables Explained
How do smart glasses work? A plain-English guide to the tiny projectors and waveguides that float an image in front of your eye — and why AI is the 2026 killer feature.