An Unexpected Discovery Last weekend my family went camping at Silver Lake State Park. Sunday was a windy, cooler day so we took advantage of the weather and hiked a mile and a half across the sand dunes to Lake Michigan. Sweatshirts went on, off, and on again as we hiked. We finally made it—panting and sweating—to the beach. The wind was whipping and the waves were huge. There was no one else in sight. It felt like we were the only people left on the planet. We watched the water crashing at our feet and wandered along the edge of the sand. In the distance I spotted something strange.…