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Two fun postcards arrived in September. The first was a print of “Balladeer” by Jose Guadalupe Posada. My pen pal claims to have carried it around for more than twenty years before mailing it! I wonder if the guitarist was still alive back then.

The second postcard comes from the Tellus Science Museum I visited last year. It’s a lenticular print, meaning the image changes depending on the angle, and it has not two but six different images representing stages of continental drift.

Mom did not know when she sent it to me that I had been working on a story that involves continental drift, and the postcard made me realize I got something wrong in my story, despite all the research that went into it. The original draft got the date wrong about when Australia completely split from what is now Antarctica, and the error was off by about 470 million years. I’ve since made the correction. Thank you, educational postcard!

Here is a brief time-lapse video showing a few billion years of continental movement.