A brainless, primeval organism able to navigate a maze might help Japanese scientists devise the ideal transport network design. Not bad for a mono-cellular being that lives on rotting leaves.
Amoeboid yellow slime mold has been on Earth for thousands of years, living a distinctly low-tech life, but, say scientists, it could provide the key to designing bio-computers capable of solving complex problems.
Toshiyuki Nakagaki, a professor at Future University Hakodate, says the organism, which he cultivates in petri dishes, “organizes” its cells to create the most direct route through a maze to a source of food.
Photo: AFP
He says the cells appear to have a kind of information-processing ability that allows them to “optimize” the route along which the mold grows to reach food while avoiding stresses — like light — that may damage them.
“Humans are not the only living things with information-processing abilities,” Nakagaki said in his laboratory in Hakodate on Japan’s northernmost island of Hokkaido.
“Simple creatures can solve certain kinds of difficult puzzles,” Nakagaki said. “If you want to spotlight the essence of life or intelligence, it’s easier to use these simple creatures.”
And it doesn’t get much more simple than slime mold, an organism that inhabits decaying leaves and logs and munches on bacteria.
Physarum polycephalum, or grape-cluster slime, grows large enough to be seen without a microscope and has the appearance of mayonnaise.
Nakagaki’s work with the slime was recognized by the award of Ig Nobel prizes in 2008 and last year. The spoof Nobel prizes are given to scientists who can “first make people laugh and then make them think.”
And, say his contemporaries, slime may sound like an odd place to go looking for the key to -intelligence, but it is exactly the right place to start.
Atsushi Tero, at Kyushu University in western Japan, said slime mold studies are actually quite an orthodox approach to figuring out the mechanism of human intelligence.
He said slime molds can create much more effective networks than even the most advanced technology that man has.
“Computers are not so good at analyzing the best routes that connect many base points because the volume of calculations becomes too large for them,” Tero said. “But slime molds, without calculating all the possible options, can flow over areas in an impromptu manner and gradually find the best routes.”
“Slime molds that have survived for hundreds of millions of years can flexibly adjust themselves to a change of the environment,” he said. “They can even create networks that are resistant to unexpected stimulus.”
Research has shown slime molds become inactive when subjected to stress such as temperature or humidity changes. They even appear to “remember” the stresses and protectively become inactive when they might expect to experience them.
Tero and his research team have successfully had slime molds form the pattern of a railway system quite similar to the railroad networks of the Kanto region encircling Tokyo — which were designed by hard-thinking people.
He hopes these slime mold networks will be used in future designs of new transport systems or electric transmission lines that need to incorporate detours to get around power outages.
Masashi Aono, a researcher at Riken, a natural science research institute based in Saitama, says his project aims to examine the mechanism of the human brain and eventually duplicate that brain with slime molds.
“I’m convinced that studying the information-processing capabilities of lower organisms may lead to an understanding of the human brain system,” Aono said. “That’s my motivation and ambition as a researcher.”
Aono said that among applications of so-called “slime mold neuro-computing” is the creation of new algorithm or software for computers modeled after the methods slime molds use when they form networks.
“Ultimately, I’m interested in creating a bio-computer by using actual slime molds, whose information-processing system will be quite close to that of the human brain,” Aono said.
“Slime molds do not have a central nervous system, but they can act as if they have intelligence by using the dynamism of their fluxion, which is quite amazing,” Aono said. “To me, slime molds are the window on a small universe.”
MONEY MATTERS: Xi was to highlight projects such as a new high-speed railway between Belgrade and Budapest, as Serbia is entirely open to Chinese trade and investment Serbian President Aleksandar Vucic yesterday said that “Taiwan is China” as he made a speech welcoming Chinese President Xi Jinping (習近平) to Belgrade, state broadcaster Radio Television of Serbia (RTS) said. “We have a clear and simple position regarding Chinese territorial integrity,” he told a crowd outside the government offices while Xi applauded him. “Yes, Taiwan is China.” Xi landed in Belgrade on Tuesday night on the second leg of his European tour, and was greeted by Vucic and most government ministers. Xi had just completed a two-day trip to France, where he held talks with French President Emmanuel Macron as the
With the midday sun blazing, an experimental orange and white F-16 fighter jet launched with a familiar roar that is a hallmark of US airpower, but the aerial combat that followed was unlike any other: This F-16 was controlled by artificial intelligence (AI), not a human pilot, and riding in the front seat was US Secretary of the Air Force Frank Kendall. AI marks one of the biggest advances in military aviation since the introduction of stealth in the early 1990s, and the US Air Force has aggressively leaned in. Even though the technology is not fully developed, the service is planning
INTERNATIONAL PROBE: Australian and US authorities were helping coordinate the investigation of the case, which follows the 2015 murder of Australian surfers in Mexico Three bodies were found in Mexico’s Baja California state, the FBI said on Friday, days after two Australians and an American went missing during a surfing trip in an area hit by cartel violence. Authorities used a pulley system to hoist what appeared to be lifeless bodies covered in mud from a shaft on a cliff high above the Pacific. “We confirm there were three individuals found deceased in Santo Tomas, Baja California,” a statement from the FBI’s office in San Diego, California, said without providing the identities of the victims. Australian brothers Jake and Callum Robinson and their American friend Jack Carter
CUSTOMS DUTIES: France’s cognac industry was closely watching the talks, fearing that an anti-dumping investigation opened by China is retaliation for trade tensions French President Emmanuel Macron yesterday hosted Chinese President Xi Jinping (習近平) at one of his beloved childhood haunts in the Pyrenees, seeking to press a message to Beijing not to support Russia’s war against Ukraine and to accept fairer trade. The first day of Xi’s state visit to France, his first to Europe since 2019, saw respectful, but sometimes robust exchanges between the two men during a succession of talks on Monday. Macron, joined initially by EU Commission President Ursula von der Leyen, urged Xi not to allow the export of any technology that could be used by Russia in its invasion