tool use – Pain In The Bud

As I’m sure most of you have heard, Jane Goodall passed away Wednesday of natural causes. She was 91.

Goodall’s work was revolutionary and her career was extraordinary. It’s difficult to imagine now, but when Goodall first pitched camp in Tanzania’s Gombe Stream National Park in July of 1960, the scientific community knew virtually nothing about great apes.

Goodall wasn’t exactly welcomed with open arms. Being female and photogenic were the first two strikes against her in the eyes of the establishment.

She was self-taught, didn’t have a degree (she later earned a doctorate at Cambridge), and perhaps her biggest “sins” involved empathy and an attitude more buttoned-up scientists saw as anthropomorphizing the animals.

Goodall with a Gombe chimpanzee. Credit: Wikimedia Commons

Goodall gave the chimps names (a no-no at the time among scientists), carefully observed and recorded their family trees, worked out the obtuse — to human eyes– social hierarchy of primate troops, and witnessed behavior that no one had ever seen before.

She saw friendship, love and loyalty among the chimpanzees, witnessed a bitter war between the Gombe troop and a splinter group, followed families over generations, and saw one chimp die of a broken heart after his mother passed away. (I recommend Goodall’s 1990 book, Through A Window: Thirty Years With The Chimpanzees of Gombe, and the 2002 follow-up, My Life With Chimpanzees, for anyone who wants to read more.)

Her first major contribution, in October of 1960, not only fundamentally challenged our assumptions about animals, it forced us to change the way we regard our own species.

Goodall, observing the chimpanzees from a distance despite the rain that day, watched as a male she named David Graybeard repeatedly dipped blades of grass into the Earth. Curious, Goodall approached the site after Graybeard left, grabbed a few blades of grass and imitated what she’d seen the chimp doing.

She was astonished when she pulled the grass out and the strands were covered in termites. David Graybeard had been eating. He was using a tool to eat!

Goodall at Gombe in the early 1970s. The primatologist secured unprecedented access to the chimpanzees by gaining their trust. Credit: Wikimedia Commons

The discovery was huge because scientists believed tool use was, at the time, limited to mankind. We build and use tools, animals don’t, the thinking went.

When Goodall reported her findings to her mentor, anthropologist Louis Leakey, his prompt response indicated the gravity of her discovery: “Now we must redefine ‘tool,’ redefine ‘man,’ or accept chimpanzees as humans.”

Goodall never stopped working with the chimpanzees of Gombe, and today her formerly humble camp has become a permanent compound where researchers — all inspired by Goodall’s story — continue to study our genetic relatives.

But in her later years, Goodall became known for her activism just as much as her work as a scientist. She traveled constantly, engaging audiences on the subjects of animal conservation, respect for nature and understanding our place in the natural order. It’s a job that has become more necessary than ever as relentless human expansion, habitat fragmentation and human behavior push thousands of species toward extinction.

We lost Frans de Waal, the famous primatologist, in 2024. Now we’ve lost Goodall, and Sir David Attenborough is less than six months shy of his 100th birthday. We’re going to need people to pick up where they left off, and the job is much more difficult than it looks, requiring expertise, charisma and the ability to connect with audiences who know little about the subject matter.

But that’s a problem for another time. For now, let’s remember Jane and appreciate all she’s done over the span of an incredible life and career.

Sperm whales are chatty.

Their language is markedly different from the deep cetacean moans associated with other whales, taking the form of Morse code-like clicks that boom through the ocean in a decibel range almost twice that of jet engines.

And while we’ve long known animals like monkeys assign specific meaning to short vocalizations varying from alarm calls to affirmations of social rank, sperm whale conversations can endure for an hour or more, with participants exchanging complex strings of clicks that vary depending on context, environment and even which pod family is speaking.

Sperm_whale_Tim_Cole_NMFS_crop — An aerial view of a sperm whale near the ocean surface. Credit: Wikimedia Commons

While artificial intelligence has been maligned over the past few years as people grapple with its rapid progress and potential for abuse, it remains the best tool we have for teasing out patterns that our human minds can’t discern, especially from large quantities of data.

With more than 9,000 recordings of sperm whales, Project CETI — Cetacean Translation Initiative, a non-profit effort to decode and translate sperm whale communication — had precisely the kind of huge data cache that AI excels at analyzing.

By feeding the recordings into specially trained machine learning algorithms, the research team was able to identify a wealth of new language patterns. While human languages are composed of quantized morphemes — prefixes, suffixes and root words — whale communication is broken down into sequences of clicks and pauses called “codas.”

Like Morse code, codas make a distinction between short clicks and long clicks. Sperm whales also vary the tempo of the clicks, which could represent inflection, “dialects” or concepts completely alien to the human mind.

“Some of what they’re doing might be totally different from our way of communicating and we’re probably never going to be able to fully grasp those differences,” Oregon State postdoctoral marine researcher Taylor Hersh told NPR.

A sperm whale fluke visible above the surface of the ocean. Credit: Wikimedia Commons

Researchers believe the “inter-click intervals” — akin to ghost notes in music — may be as significant as the clicks themselves. Importantly, while human ears were able to identify and catalog some of the codas, the machine learning algorithms found many that human analysis missed.

That’s not surprising considering sperm whales — the loudest animals on Earth, capable of generating sounds up to 230 dB — took a much different evolutionary course and, as ocean-dwelling creatures weighing up to 90,000 pounds (40,800 kg) likely have a radically different sensorium compared to humans.

The comparisons to music go further than ghost notes.

“This study shows that coda types are not arbitrary, but rather that they form a newly discovered combinatorial coding system in which the musical concepts of rubato and ornamentation combine with two categorical, context-independent features known as rhythm and tempo, by analogy to musical terminology,” CETI’s team wrote on May 7 while unveiling the most recent study.

Sperm_whale_distribution_(Pacific_equirectangular) — Sperm whale distribution based on human sightings. Sperm whales freely travel the oceans except in cold, ice-packed environs. Credit: Wikimedia Commons

While people have used many abilities to mark the dividing line between humans and animals over the years — including the ability to use tools, experience emotions, and demonstrate self-awareness — human capacity for authentic language with syntax and context-dependent meaning was one of the stalwarts, standing the test of time as new research toppled the other dividers by showing animals do indeed use tools, experience rich emotions and have complex inner mental lives.

With this research, scientists are assembling a “sperm whale phonetic alphabet” that will make it easier to discern and catalog whale codas.

To be clear, there’s still a lot of work ahead before scientists can prove sperm whale codas are comparable to human definitions of language, but whether they strictly meet that definition may not matter. After all, it’s clear the clicks and pauses of whale codas are imbued with meaning, even if it remains elusive to us for the moment.

Indeed, “sperm whale communication has both contextual and combinatorial structure not previously observed in whale communication,” the team wrote.

Proving sperm whale codas are tantamount to human language isn’t the goal anyway. The team has two overriding priorities — decode the meanings behind the codas, and get the wider public invested in the fate of these endangered animals by showing they’re not so different from us.

“Our results show there is much more complexity than previously believed,” MIT AI lab director Daniela Rus told NPR, “and this is challenging the current state of the art or state of beliefs about the animal world.”