Mary took this photo, and showed it to me. Apparently, her sister had problems seeing the prominent figure in it, so she put her phone in my face and asked if I could see it. I instantly focused on the strand of spider silk in the lower right, and was looking for the spider (what else would you take a picture of?) but couldn’t find it. Then she told me it wasn’t a spider at all.
I was so confused. No spider? What? Why?