���xcolonies of bacteria, mineral deposits, fungal networks, a fragment of an engine block, a snaking river delta, a cluster of starfish, a segment of a highway system, an accumulation of pollen grains, a scattering of feathers, a section of a`tree's bark, a group of sea cucumbers, a portion of a coral reef, a patch of moss, a fractured piece of bone, a collection of seashells, a tangle of roots, a fragment of a crystal lattice, an aggregation of spores, a piece of driftwood, a cluster of eggs, a section of a tree's cambium layer, a gathering of feathers from different birds, a patchwork of skin tissue, a segment of a leaf's venation system