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Slime Molds in all their colorful glory!

What are Slime Molds?

 Slime molds are a remarkable lineage of amoebas that live in soil. While they spend part of their life as ordinary single-celled creatures, they sometimes grow into truly alien forms. Some species gather by the thousands to form multicellular bodies that can crawl. Others develop into gigantic, pulsating networks of protoplasm.

While naturalists have known of slime molds for centuries, only now are scientists really starting to understand them. Lab experiments are revealing the complex choreography of signals in some species that allows 20,000 individuals to form a single sluglike body.

How Intelligent is Slime Mold?

The pulsating networks that some slime molds form are giving other scientists clues to solving difficult mathematical problems. In 2000, Japanese researchers placed Physarum polycephalum — the name means “many-headed slime mold” — in a maze, along with two blocks of food. It extended its tendrils down the corridors of the maze, bending around curves, reaching dead ends and then backing out of them. After four hours, the slime mold was feasting on both blocks of food. 

How old Are Slime Molds?

By analyzing the DNA of different slime mold species, researchers are reconstructing their evolutionary history, which turns out to reach back about a billion years. Since all known slime molds live on land, that suggests that they were early pioneers, arriving hundreds of millions of years before animals or plants. 

What Scientists think about Slime Mold today:

Today, biologists no longer think of slime mold like an embryo: It is more like a society of amoebas that come together for a common cause, for which some will sacrifice themselves.

The organisms respond to starvation by rushing together by the thousands into a single blob. The blob stretches out into a slug-shaped mass about one millimeter long (one twenty-fifth of an inch), which then crawls like a worm toward light.

 

 Once it reaches the surface of the soil, the slug undergoes another transformation: Some of the cells turn into a stiff stalk, while the others crawl to the top and form a sticky ball of spores, about a millimeter per hour, to feed on microorganisms living in decaying plant material.  . They stick to the foot of an animal and travel to a hospitable place.

Inside the slug like structure, about 1 percent of the amoebas turn into police. They crawl through the slug in search of infectious bacteria. When the amoebas find a pathogen, they devour it. These sentinels then drop away from the slug, taking the pathogen with it. They then die of the infection, while the slug remains healthy.

When the slug is ready to make a stalk, more amoebas must die so that others can live. They climb on top of one another and transform their insides into bundles of cellulose. Twenty percent of Dictyostelium cells die this way, allowing the survivors to climb up their lifeless bodies and become spores.

Can you eat Slime Mold?

Sadly Not edible. There are reports that it is eaten in Mexico, however after some research I found that it was aother fungi talked about.. This species is not known to cause sickness in humans, but lets be honest, how many people have eaten it? The many dusty spores can irritate people with allergies, asthma, or other respiratory conditions. 


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