Slime molds are diminutive organisms of "brainless intelligence" that used to be classified as fungi but are now considered to be part of the kingdom Protozoa, due to their distinctively non-fungi-like behavior of forming a structure known as a plasmodium, which moves around slowly ingesting decaying organic matter. When this plasmodium has eaten enough, or the air gets cold or dry, it changes from a slimy mass into a group of tiny, fruiting bodies that can release innumerable spores.