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Why a Compass Works

A compass seems simple — a needle that always points north.
But behind that tiny movement lies one of Earth’s most powerful and invisible forces.

In this cinematic science documentary, we explore why a compass works, tracing its behavior to the magnetic field generated deep within Earth’s core. From molten iron to planetary-scale magnetism, the compass is quietly connected to the inner workings of our planet.

🧭 In this video, you’ll discover:

What makes a compass needle move

How Earth’s magnetic field is created

The role of Earth’s molten iron core

Why north is not always where we think it is

How Earth’s magnetism protects life itself

Every time a compass points north, it is responding to forces thousands of kilometers beneath your feet — forces that have shaped navigation, exploration, and life on Earth.

If you’re fascinated by the hidden systems that keep our planet alive, subscribe to The Evolution of Earth for cinematic science documentaries.