When I walk in suburban streets, I am usually looking straight down. There is a fascinating tiny world down there - cracks in the paving, insects scurrying, leaves and seed pods, dandelion tumbleweed, bird feathers, snails, bits of litter.
There's so much in these tiny worlds we loom above and barely see.
Check out these unbelievably spectacular photos from the Nikon Small World Photomicograph Competition, at Slate's Behold photography blog. I especially love the slab of sedimentary agate; both familiar and alien, it's a stunning reminder of how spectacular is the world in miniature right below us.