The Earth takes a year to go around the Sun and a day to turn on its axis.

It's tilted 23.5 degrees, which is what causes the seasons.

All of these facts you learned in school are true, but they're not permanent.

They change very slowly over time. One astrophysicist

in the 1920s figured out that all of these cycles could interact with each other affecting

the long-term climate of the Earth.

Learn more about Milankovic cycles on this episode of Everything Everywhere Daily. This episode is sponsored by the Travel Photography Academy.

In 2007, I sold my home to travel around the world.

I bought an expensive camera that I didn't know how to use and took a bunch of terrible photos.

Several years, a hundred countries, and tens of thousands of photos later,

I had improved my photography to the point where I was winning national awards,

being named Travel Photographer of the Year three times in North America.

I created the Travel Photography Academy

so you don't have to spend the many years that I did to improve your photography.

Even though we can't easily travel right now, you can still work on improving your photography at home and in your own community.

Just go to travel photography academy.com or click on the link in the show notes to start improving your photography today.

To understand Milankovic cycles, we have to understand each of the cycles which the Earth goes through individually.

There are several of them and it's going to take a bit of visualization to get the

concept via a podcast where there are no visual aids, but it shouldn't be too difficult.

We'll start by going through the cycles that the Earth itself goes through.

To understand these you need to think of the Earth as a spinning top.

When the top spins, it's usually not perfectly upright. The top will be tilted somewhat. Just

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