Gregory Forth on Flores Fossils and Reports of Humanlike Beings

Joe Rogan welcomes cultural anthropologist Gregory Forth to discuss Homo floresiensis and accounts of small, humanlike beings on Flores, Indonesia. The fossil species is established; the suggestion that an unknown hominin survives today is unconfirmed.

Rogan asks when the Flores fossils were discovered. Forth distinguishes the 2003 discovery from its 2004 public announcement, setting up the chronology of his earlier fieldwork and later interpretation.

Forth says he began anthropological fieldwork on Flores in 1984, studying local people, culture and languages. During that first visit he heard Nage accounts of small humanlike beings said to have disappeared generations earlier.

He later heard reports from the Lio region farther east, including accounts that some people described as recent encounters. He regards their resemblance to reconstructions of H. floresiensis as a reason to investigate; a resemblance does not establish a biological identity.

The guest says local descriptions vary and that his book focuses particularly on the Lio material. The conversation repeatedly returns to the question of how oral accounts should be assessed alongside, rather than equated with, fossils.

Forth distinguishes cultural anthropology from paleoanthropology and describes earlier excavations that found Stegodon remains and stone artifacts on Flores. Researchers subsequently recovered much older hominin jaw and tooth fragments in the island’s central region.

He says the older fragments, around 700,000 years old, have been discussed as possible ancestors or relatives of H. floresiensis. He also mentions still older stone artifacts. Assigning a tool or fragment to a particular maker requires evidence beyond its age alone.

Asked whether the stones are unmistakable tools, Forth acknowledges that this is outside his specialty and that some interpretations have been disputed. The speakers look at examples, while he cautions that separate human species cannot always be distinguished from stone industries alone.

Earlier stone finds motivated a lengthy search for hominin remains. Forth says researchers eventually recovered jaws and teeth; the relationship between these older remains and the later Liang Bua fossils is an active interpretive question.

Forth discusses Stegodon bones and an interpretation that Komodo dragons may have killed some animals, with hominins potentially scavenging remains. The origin of particular marks and the identity of a toolmaker are questions for the underlying archaeological analysis.

He describes an argument that marks on some Stegodon bones were made by Komodo dragons and that other marks might reflect later scraping. This is presented as a particular analysis, not proof that every bone at the site has the same history.

Rogan considers whether tool marks might have been made by modern humans. Forth answers cautiously about the dating and says he does not recall clear evidence that H. sapiens killed the elephants in question.

Rogan asks whether H. sapiens could have overlapped with the extinct hominin on Flores. Forth says dates for modern human presence have been revised and notes uncertainty about precisely which species made particular marks or tools.

They discuss the revision of the Liang Bua chronology. A [2016 Nature study](https://www.nature.com/articles/nature17179) dated the H. floresiensis skeletal remains to roughly 100,000–60,000 years ago and associated stone artifacts to roughly 190,000–50,000 years ago; those are evidence from that site, not a sighting today.

An early estimate placing the fossils much closer to the present was later revised. The change illustrates why dates are tested against geological layers and multiple dating methods rather than chosen to match a desired story.

Forth compares Flores stories with reports of Orang Pendek on Sumatra, where other primates live. He says Flores has macaques introduced by people but no native apes, making the local ecological setting different. These comparisons do not verify either reported animal.

Asked how often encounters occur, he says he recorded more than 30 reports and considers some more informative than others. He notes that some descriptions could reflect monkeys, especially when the circumstances make identification difficult.

Forth says he gave greater weight to reports that included more detail and were less easily explained by a known animal. Rogan asks what makes an account less convincing; Forth cites context and a possible mistaken macaque identification.

The pair speculate about diet from fossils and reported behavior, including possible plant foods and occasional animal prey. Forth presents these as inferences; neither a fossil’s teeth nor an anecdote establishes the diet of an unverified living population.

Forth describes Flores as relatively poor in native land mammals and mentions bats, rodents and introduced animals. The conversation turns to Komodo dragons, giant rats and how animal communities may have changed after human introductions.

Rogan asks how large predatory lizards could find enough food on an island. Forth points to changes in available prey through time, including extinct animals and later introductions, while cautioning that he does not recall all dates.

He says introduced and feral animals now provide food for Komodo dragons, while Rogan considers how earlier extinctions and later introductions might relate. Their proposed sequence is a hypothesis, not a reconstruction demonstrated by this interview.

Forth explains that he originally went to Flores to learn about people’s lives and beliefs, not to search for a hidden species. He describes Nage livelihoods in the 1980s as mainly small-scale cultivation, with hunting also culturally important.

Forth says the Nage people he worked with grew much of their own food and valued hunting. His fieldwork began as a study of a community, not as an expedition to prove a cryptid story.

He describes local hunting of deer, pigs and other animals, and says large tree rats can be difficult to catch. He is careful to distinguish what people told him from direct evidence about what an extinct hominin ate.

The first Nage story he recounts concerns beings called ebu gogo who, according to the narrative, once visited villagers and were later killed. He identifies narrative embellishment and a recurring motif about two survivors, rather than treating every detail as a historical record.

In the Nage narrative, the visitors allegedly came to feasts and behaved strangely before the villagers acted against them. Forth calls attention to the story’s plot and symbolic features as part of his ethnographic interpretation.

Forth estimates that the story’s local genealogical setting points to a few centuries ago, while acknowledging the uncertainty. He says narrators distinguished these beings from invisible forest spirits in the way they described them.

The host asks whether the first account described an animal rather than a spirit. Forth says the people he spoke with made that distinction, although the description itself cannot prove that a particular animal existed.

His first reported eyewitness accounts in the Lio region came shortly before the Flores fossil discovery and public announcement. He says their timing mattered to him because the witnesses could not have been reacting to that later publicity in the same way.

The speakers examine a map and describe Flores as mountainous and heavily vegetated. Difficult terrain can make a field survey demanding, but it is not evidence that a particular unknown species is present.

When shown the island’s terrain, Rogan remarks that a great deal of forest is difficult to examine. Forth notes that zoological work has been done in parts of Flores, though he says there has not been a dedicated search of the kind they are discussing.

Forth notes a Lio–German dictionary published in 1933 that recorded a local term and example sentences before the fossil discovery. This supports the age of a linguistic tradition; it does not establish what, if anything, a report described biologically.

The old dictionary matters to Forth because it records a term before the fossils became public. He does not claim that a dictionary definition can substitute for biological evidence.

He returned to the region with research funding after the fossil discovery and interviewed many people about local knowledge. He distinguishes roughly 32 encounter reports from more than 120 people who knew about the category in some form; not all interviewees claimed to have seen anything.

Rogan initially interprets the number of interviews as a number of sightings. Forth corrects him: many people supplied general knowledge, while only a subset gave encounter reports.

Forth says he compared descriptions for detail and internal consistency and discounted some possible monkey sightings. Similar accounts can be valuable ethnographic evidence, but independent physical evidence would be needed to identify a new or surviving species.

Rogan asks what a search would require. Forth mentions people experienced in mountain terrain, primatology and zoology, and suggests camera traps and drones could assist; he says a colleague is interested in organizing further fieldwork.

A search team, he suggests, would need different kinds of expertise: people able to travel safely in the terrain and specialists able to assess any animal evidence. The speakers also discuss the practical limitations of a small expedition.

They discuss the practical challenge of spending enough time in remote terrain without disturbing wildlife. Forth does not promise that a search would succeed and says his own age and physical circumstances limit his ability to conduct such fieldwork.

Rogan suggests an experienced field-documentary maker might help with an expedition. Forth is interested in practical expertise but acknowledges that interest in a search is different from having a confirmed discovery.

Asked about the geographical range of reports, Forth says his own work concentrated on eastern Lio and that he cannot draw a precise boundary for the tradition. Local knowledge can vary between neighboring communities.

He recounts being contacted by two British hikers about an encounter they said occurred in 2019. One described a small humanlike figure; the other understood it more as a large monkey. Forth interviewed them separately after they contacted him.

He says one hiker searched for information about monkeys on Flores and then contacted him. Because the report was made after the encounter, it must be evaluated with ordinary caution about memory and later interpretation.

The hikers contacted him years after the event after searching online, he says. Their account is a retrospective, secondhand report in this interview; the speakers provide no specimen or independently verifiable image.

Forth recalls other accounts, including one from an anthropologist on the neighboring island of Sumbawa. He says that person described several forms in difficult lighting and had made field notes. Such records document an experience and interpretation, not a confirmed taxonomic identification.

Forth turns to a colleague’s report from the nearby island of Sumbawa, recorded in field notes. The described encounter took place in difficult visual conditions, and the account remains an interpretation rather than a confirmed identification.

He also recalls hearing larger forest-being traditions on Sumba and becoming interested in reports of Bigfoot while studying in British Columbia. He regards those traditions as distinct from the Flores fossil find.

The host mentions the familiar Patterson–Gimlin Bigfoot film. The two note longstanding doubts about it, and Forth separates interest in a film or report from evidence that a population exists.

The conversation turns to the incompleteness of the fossil record. Forth says the latest known fossil is not necessarily the exact date a species disappeared. That uncertainty alone, however, does not demonstrate survival into the present.

Forth stresses that the fossil-bearing cave represents a very small area of a larger island. A wider geographic record could add information, but an absence of fossils from other places is not positive evidence for a living population.

They revisit how H. floresiensis and its possible predecessors reached Flores. Forth says there is no known land bridge in the scenario under discussion and mentions accidental transport on floating vegetation as one possibility; the route remains uncertain.

Rogan asks how a founder population might have crossed water and remained viable. Forth discusses accidental rafting and the need for more than one individual; they do not establish that this is how the Flores lineage arrived.

Forth discusses island fauna and the possibility that some animals swam or were introduced by people. He distinguishes introduced monkeys and domestic animals from species already present, while acknowledging uncertainty about exact introduction dates.

The speakers mention Homo luzonensis in the Philippines and Homo naledi in South Africa as other fossil discoveries. Different fossil species in different places should not be treated as evidence of one surviving animal population.

Rogan and Forth discuss a claim that H. naledi deliberately buried its dead. [Researchers have proposed](https://doi.org/10.7554/eLife.89106) that interpretation, but [other specialists dispute](https://paleoanthropology.org/ojs/index.php/paleo/article/view/1099) whether the available evidence establishes intentional burial; it remains contested rather than settled.

The discussion of ancient species expands to a branching view of human evolution. A shared broad category of small-bodied hominins does not mean the fossils belong to the same species or imply the same date of extinction.

Forth describes early debate over whether the Flores fossils represented a distinct species or an individual with a medical condition. He also discusses unresolved questions about the hominin’s deeper evolutionary relationships and classification.

Forth mentions proposals for alternative classification and ancestry of H. floresiensis. He presents the taxonomic debate as an example of how researchers interpret a limited fossil sample in different ways.

He rejects a simple ladder of human evolution in favor of a branching tree with multiple lineages. Rogan raises other cases where archaeological interpretations changed; Forth says caution and a high evidentiary bar are appropriate in science.

The host argues that scientists can resist changing established views. Forth agrees that debate can be contentious, but adds that demanding strong evidence before revising a conclusion serves an important purpose.

Forth explicitly says he is not asserting that H. floresiensis or a descendant definitely survives. As an ethnographer, he wants to understand the basis of people’s accounts, including which reports describe perceived natural encounters and which concern spirits.

Rogan asks whether hallucinogenic substances might explain some accounts. Forth says he is not aware of such a local tradition and mentions alcohol and betel chewing instead. His field experience is not a comprehensive survey, and an individual account cannot be diagnosed remotely.

The conversation briefly describes the local use of betel and areca preparations. Forth reports his own experience but does not present it as evidence for or against any particular encounter account.

Forth gives an example of an unusual local description that he interprets as referring to a palm civet. The discussion shows how an account can combine observation and elaboration; the same interpretive issue must be considered for other reports.

Rogan raises the ethics of studying a hypothetical surviving hominin. Forth says he would prefer nonintrusive field observation to captivity if such a population were ever verified. The discussion is hypothetical because no such living population has been established.

Rogan relays another person’s report from New Guinea. Forth notes that documented short-statured Indigenous populations there are fully modern humans and should not be confused with H. floresiensis. The identity behind an isolated anecdote cannot be established from a retelling.

Forth objects to assuming that a Western narrator is inherently more credible than a Flores Islander. Evaluating accounts consistently means examining the circumstances and corroboration rather than assigning credibility by origin alone.

They compare other regional accounts of humanlike beings. Forth says the amount and quality of information vary, and descriptions such as “hairy” can mean different things to different speakers.

Rogan and Forth discuss Bigfoot traditions and historical newspaper stories. They distinguish these stories from the Flores fossil record; a newspaper account or a sincere witness is not, on its own, a verified specimen.

The guest distinguishes descriptions based on alleged firsthand encounters from more elaborate stories passed between people. He thinks that distinction is useful ethnographically; it cannot on its own confirm the existence of the described being.

Forth contrasts incentives and cultural settings in Flores and North America when people report unusual experiences. He argues these differences matter for interpreting reports, while neither setting eliminates the need for independent corroboration.

They examine the 1884 “Jacko” newspaper story, which the source shown in the interview describes as widely regarded as a hoax or fiction. Forth discusses alternative interpretations, while acknowledging that no photograph or specimen is presented.

Asked whether an unknown North American primate might once have existed, Forth says he does not want to rule out possibilities in the abstract. He considers the Flores context different because actual extinct hominin fossils have been found there.

Forth says he does not find Bigfoot credible and suggests that cultural expectations, mistakes and imperfect viewing conditions may contribute to some reports. Rogan describes a witness he found sincere but acknowledges he cannot identify what she saw.

Rogan describes the dense Pacific Northwest forest and wonders how difficult it would be to observe an elusive animal. Forth mentions scent as another practical factor; neither offers verifiable evidence that the hypothetical animal exists there.

They discuss historical mistreatment and exhibition of short-statured Indigenous people. Forth emphasizes that these were modern human beings, not a separate hominin species, and corrects himself for describing animals as “discovered” when local communities already knew them.

At the close, Forth mentions a forthcoming book on witchcraft accusations. He distinguishes the study of beliefs and accusations from accepting supernatural claims, and Rogan invites him back for a future discussion.