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WTF Fun Fact 13308 – Smart Slime

Have you ever heard of “smart slime”?

Physarum polycephalum is a type of slime mold. Fun, right? Well, it’s actually found in many natural areas around the world. If you run across it, throw it a puzzle!

This mold is capable of solving complex mazes and other spatial problems without a brain or nervous system. Ok, not a boxed puzzle.

Despite lacking a brain, this organism has navigated mazes and established efficient routes between food sources. Scientists still don’t know what to think.

How does “smart slime” work?

So how does Physarum polycephalum do it? According to some researchers, the key lies in the way that this slime mold processes and responds to information.

Humans and other animals rely on centralized nervous systems to process and interpret information from the environment. But slime molds are decentralized and they exhibit a more distributed form of intelligence.

One striking example of this distributed intelligence can be seen in the way that slime molds navigate mazes. When placed in a maze with multiple food sources, slime molds are able to explore and test different paths! They gradually identify the most efficient routes between the food sources. This ability has been attributed to the slime mold’s ability to sense and respond to different environmental cues. In other words, they can sense the presence of food, humidity, and light. But it’s a whole extra step to use that information to solve problems!

Some researchers have suggested that the slime mold’s ability to solve spatial problems may be related to its ability to process information in a way that is fundamentally different from known forms of intelligence. For example, one study found that Physarum polycephalum is capable of solving the “shortest path problem.” This involves finding the shortest route between two points in a network.

Humans typically solve this problem by analyzing and comparing different routes. But slime mold is able to accomplish the same task by physically growing and adapting to the network itself. Say what?!

Nature loves a puzzle

Despite its remarkable abilities, Physarum polycephalum is still a subject of ongoing research and debate among scientists. Some researchers believe that the slime mold’s distributed intelligence may hold the key to developing new forms of artificial intelligence. Other people are understandably freaked out by that.

Many scientists are focused on understanding the fundamental biological mechanisms underlying its behavior before they go trying to turn it into a monster.

One thing is clear: the slime mold’s abilities are truly remarkable. As we continue to study and learn from this fascinating organism, we may even discover new insights into the nature of intelligence, adaptation, and evolution itself.

— WTF fun facts

Source: “This Weirdly Smart, Creeping Slime Is Redefining How We Understand Intelligence” — ScienceAlert

WTF Fun Fact 13008 – Financial Stress Lowers IQ

Fun Fact: “A Harvard study found that our IQs can drop by 13 points when we are under financial stress. This is in part due to the amount of brain power we use to think about any financial burdens we carry, causing distraction.”
Are you surprised to hear that financial stress lowers IQ?

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According to Canada’s CBC News (cited below), “People struggling to pay their bills tend to temporarily lose the equivalent of 13 IQ points, scientists found when they gave intelligence tests to shoppers at a New Jersey mall and farmers in India. The idea is that the financial stress of trying to make ends meet monopolizes thinking, making other calculations slower and more difficult, sort of like the effects of going without sleep for a night.”

Financial stress and IQ

We know IQ tests aren’t reliable indicators of innate intelligence, but they can be used to measure changes in a person’s cognitive capacity under different conditions. In other words, we don’t have to compare a person’s scores to anyone else’s, we can compare their specific scores without making judgments about their overall intelligence.

CBC described the study:

“The scientists looked at the effects of finances on the brain both in the lab and in the field. In controlled lab-like conditions, they had about 400 shoppers at Quaker Bridge Mall in central New Jersey consider certain financial scenarios and tested their brain power. Then they looked at real life in the fields of India, where farmers only get paid once a year. Before the harvest, they take out loans and pawn goods. After they sell their harvest, they are flush with cash.

[Harvard researcher Sendhil] Mullainathan and colleagues tested the same 464 farmers before and after the harvest and their IQ scores improved by 25 per cent when their wallets fattened.”

What the study doesn’t mean

The study does not mean that rich people are smarter than people who are having temporary or long-term financial difficulties. It only means they have more cognitive resources to “spend.” They can think more clearly and concentrate better on other tasks since they’re not worried about money. — WTF fun facts

Source: “Financial stress can induce drop in IQ” — CBC News