Monkey reaching for a glowing brain with a rake of light.

Unlock Your Inner Genius: How Animal Tool Use Reveals the Secrets to Cognitive Evolution

Soraya Malik in Science & Nature August 2025 • 4 min read.

"Dive into the fascinating world of animal tool use and discover how understanding their learning processes can unlock new potential in human cognitive abilities."

Tool use isn't just a human trait; it's a shared behavior across the animal kingdom. Studying how animals adapt and use tools provides a unique window into understanding the dynamic relationship between cognitive abilities and environmental demands. Understanding this allows researchers to learn more on how humans evolve.

This article delves into the groundbreaking research on tool use in primates, specifically focusing on Japanese macaques and common marmosets. These primates, not typically known for tool use in the wild, have demonstrated remarkable learning capabilities in controlled environments. Analyzing their cognitive and neural adaptations during tool acquisition sheds light on the underlying mechanisms of intelligence and adaptability.

These studies reveal insights into the conditions necessary for tool use acquisition, the cognitive characteristics that emerge during this process, and the structural changes that occur in the brain. By comparing different species and their approaches to tool use, scientists are uncovering potential pathways for cognitive enhancement and a deeper understanding of intelligence itself.

What Can We Learn From How Animals Use Tools?

Monkey reaching for a glowing brain with a rake of light.

Numerous studies have documented tool use in the animal kingdom, revealing that this ability isn't limited to a select few. The question arises: why do some animals use tools, while others don't, even when faced with similar environmental challenges?

Environmental adaptation and cognitive ability are key, but they're not the only factors. As the text details, research into tool use in non-human animals began with wild apes and has since expanded to a variety of species, each employing tools for different purposes, from foraging to grooming and even displays.

Reaching the Unreachable: Tools like rakes extend an animal's reach.
Amplifying Force: Stone tools and hammers increase mechanical power.
Displaying Power: Branches augment agonistic displays.
Controlling Fluids: Sponges allow for better fluid management.

Humans use tools for a myriad of purposes, far beyond basic survival. Beck (1980) offered a framework categorizing tool use by animals based on function, from extending reach to amplifying mechanical forces. Asano (1994) further expanded this concept by proposing three 'classes' of tools:

Expansion of discriminative stimulus
Expansion of response topography
Expansion of reinforcing stimulus

This prompts the question: do animals also use tools for 'expansion of discriminative and reinforcing stimuli,' or is their tool use fundamentally different from humans'?

The Next Step in Understanding Intelligence

By studying these animals, and comparing them with humans it allows for a deeper understanding of the origin of intelligence. This comparative perspective allows the development of tools for humans in the world and further enhances humans existence and knowledge. The research highlights the importance of neuroplasticity, motivation, and sustained training in unlocking cognitive potential.

About this Article -

This article was crafted using a human-AI hybrid and collaborative approach. AI assisted our team with initial drafting, research insights, identifying key questions, and image generation. Our human editors guided topic selection, defined the angle, structured the content, ensured factual accuracy and relevance, refined the tone, and conducted thorough editing to deliver helpful, high-quality information.See our About page for more information.

This article is based on research published under:

DOI-LINK: 10.1007/978-4-431-56559-8_8, Alternate LINK

Title: Behavioural, Cognitive And Neuronal Changes In The Acquisition Of Tool Use

Journal: Evolution of the Brain, Cognition, and Emotion in Vertebrates

Publisher: Springer Japan

Authors: Yumiko Yamazaki, Atsushi Iriki

Published: 2017-01-01

Everything You Need To Know

How does studying tool use in animals like Japanese macaques and common marmosets help us understand human cognitive evolution?

Researching tool use in animals such as Japanese macaques and common marmosets offers insights into the cognitive and neural adaptations that occur during tool acquisition. By observing these primates, scientists can identify the conditions necessary for acquiring tool use skills, the cognitive characteristics that emerge, and the structural changes in the brain. Comparing these findings with human tool use provides a deeper understanding of the origins of intelligence and potential pathways for cognitive enhancement in humans. This comparative perspective helps in developing new tools and strategies to further enhance human existence and knowledge, specifically in areas like neuroplasticity and sustained training.

What key factors determine whether an animal will use tools, even when faced with similar environmental challenges?

Whether an animal uses tools depends on a combination of environmental adaptation and cognitive ability. Environmental challenges alone are not sufficient. Research has identified specific functions of tool use among various species, such as extending reach with rakes, amplifying force with stone tools, enhancing displays with branches, and controlling fluids with sponges. Additionally, the research explores whether animals use tools for 'expansion of discriminative and reinforcing stimuli,' which is a complex aspect of tool use observed in humans, suggesting there might be fundamental differences in tool use between humans and other species.

In what ways do the studies of tool use in animals inform us about enhancing human intelligence?

The study of tool use in animals, particularly Japanese macaques and common marmosets, offers insights into the neuroplasticity, motivation, and sustained training necessary to unlock cognitive potential. Understanding how these animals adapt and learn to use tools can reveal the underlying mechanisms of intelligence and adaptability. By comparing the cognitive characteristics and brain changes in tool-using animals with those in humans, researchers can identify potential pathways for cognitive enhancement and develop new strategies to improve human cognitive abilities. The research also helps in understanding the importance of sustained effort and motivation in cognitive development.

Beyond basic survival, what other functions of tool use have been identified in animals, and how do they compare to human tool use?

Animals use tools for various functions beyond basic survival, including expanding reach, amplifying force, and enhancing displays. While humans use tools for a myriad of purposes, research categorizes tool use by animals based on function, such as extending reach, amplifying mechanical forces, and controlling fluids. Asano expanded this concept by introducing classes of tools like the expansion of discriminative stimulus, response topography, and reinforcing stimulus. This prompts questions about whether animals also use tools for 'expansion of discriminative and reinforcing stimuli,' or if their tool use fundamentally differs from that of humans. This comparative analysis allows for a deeper understanding of the evolution of tool use and its implications for cognitive development.

How do the concepts of 'expansion of discriminative stimulus' and 'expansion of reinforcing stimulus' apply to understanding tool use in both animals and humans?

The concepts of 'expansion of discriminative stimulus' and 'expansion of reinforcing stimulus,' proposed by Asano, suggest that tools can enhance the sensory information available to an organism and amplify the rewarding effects of an action. In humans, these expansions are evident in complex tool use where tools are used not only to achieve a physical goal but also to enhance perception and satisfaction. Research investigates whether animals also exhibit tool use for these purposes. Understanding if animals use tools to expand discriminative and reinforcing stimuli can reveal fundamental differences or similarities in cognitive processing between humans and animals, shedding light on the evolution of intelligence and the complexity of tool use behavior.