365 Days Of Astronomy - Weekly Edition

For this historic 444th episode of Astronomy Cast, we talk about fractals. Those amazing mathematical visualizations of recursive algorithms. What are they, how do you get them? Why are they important?

Want to travel the world but you don't have a lot of money? No problem, your continent is drifting across the surface of the Earth right now. In a few million years, you'll reach your destination.

There are regular volcanoes, and then there are the supervolcanoes. Massive calderas of hot magma of incomprehensible size. Bad news, these things explode randomly and catastrophically. Worse news, there are a bunch around the Earth.

Surf's up! Today we're going to be talking about one of the most devastating natural disasters out there: tsunamis. We're talking huge waves that wreck the seashore. But it turns out, there many ways you can get a tsunami, and one of those has to do with space.

If we look back into the geologic record of the Earth, it appears that our planet’s magnetic field flips polarity every few hundred thousand years or so. Why does this happen? When’s it supposed to happen next? Is it dangerous?