Sand is a good writing medium. You’ve seen the photos on social media: a drone’s eye view of a marriage proposal or a love note stomped in sand. Advertiser’s use it, too, although their messages in the sand are AI generated, I’m sure. In fact, it’s such a popular concept you can now go to various platforms online and create a greeting card depicting a sand message signed by you! I prefer writings left in the sand by surf interacting with bits of shell and other beach detritus. One of the photos in my #TrackingTide series is titled “Peace Offering…