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Magnetic Storm – This PBS video is all about the Earth’s magnetic field. Did you know the Earth’s magnetic field protects us from solar radiation, and that it has changed in direction and magnitude throughout the planet’s history?

Ancient trees show when the Earth’s magnetic field last flipped out – This interesting news article from NPR gives some information about the last pole reversal, and how it was detected using trees. I recommend reading it after watching Magnetic Storm.

(Podcast) Magnets: the hidden objects powering your life – This 12-minute podcast gives a helpful introduction to magnets, magnetism, and why magnets are important.