ELI5: Explain Like I'm 5

True polar wander

So, imagine you are standing on a globe that is spinning around. This globe has a North Pole and a South Pole. As it spins, you may notice that you are not standing on the same spot all the time. This is because the Earth is not a perfect sphere and the land masses on it are not evenly distributed.

But something even more interesting can happen! Imagine the globe suddenly tilts over and the North Pole starts moving towards a different spot on the globe. This is what we call True Polar Wander.

What causes True Polar Wander? Well, it turns out that the Earth's outer layer, called the crust, can move independently sometimes. And when it does, it can cause the North Pole to move around. This doesn't happen quickly, it would take thousands or even millions of years for any noticeable movement. But it has happened before in Earth's history!

Scientists can see evidence of this movement by studying rocks and fossils. Sometimes they find rocks that were formed close to the equator, but are now at higher latitudes (closer to the poles). This shows that the land they were on moved over time.

So, True Polar Wander is when the Earth's crust moves and causes the North Pole to shift around. It happens over a long period of time and can be seen in the rocks and fossils on Earth.