Homo floresiensis, also called "Flores Man" or "Hobbit," is an extinct group of small early humans that lived on the island of Flores, Indonesia, until modern humans arrived about 50,000 years ago.

In 2003, scientists found the remains of an individual who was about 1.1 meters (3 feet 7 inches) tall in a cave called Liang Bua. By 2015, researchers had uncovered partial skeletons of 15 individuals, including one complete skull named "LB1."

The ancestors of H. floresiensis are believed to have reached Flores around 1.27 to 1 million years ago. Scientists now agree that the small size of these humans was likely caused by insular dwarfism, a process where animals shrink over time when living on islands. Some researchers once debated whether H. floresiensis was a smaller version of Homo erectus from Java or a different group of early humans that left Africa.

At first, scientists thought H. floresiensis lived until about 12,000 years ago. However, later studies showed that their remains are much older. The skeletal remains at Liang Bua are dated to between 60,000 and 100,000 years ago. Stone tools found with the bones are from 50,000 to 190,000 years ago. Earlier remains from a site called Mata Menge are about 700,000 years old.

Specimens

On September 2, 2003, a team of Australian and Indonesian archaeologists discovered the first fossils on the island of Flores, Indonesia. They were searching for evidence of how early humans migrated from Asia to Australia. Instead, they found a nearly complete skeleton, named LB1, in Liang Bua cave. Later excavations in 2003 and 2004 uncovered seven more skeletons, which were initially dated to between 38,000 and 13,000 years ago.

In 2004, scientists named the species Homo floresiensis, with LB1 as the main example. A tooth, LB2, was also linked to this species. LB1 is a nearly complete skeleton, including a full skull, belonging to a 30-year-old woman. It is sometimes called "Little Lady of Flores" or "Flo." Another bone, LB3, is about 74,000 years old and was temporarily assigned to Homo floresiensis. The fossils are not fully fossilized and have a texture similar to wet paper. After being exposed, the bones needed to dry before they could be removed. Researchers suggested that a mix of old and new traits in the fossils shows they belong to a new species. They also proposed that Homo floresiensis lived at the same time as modern humans on Flores. Before publishing their findings, scientists considered placing LB1 in a new genus, Sundanthropus floresianus, but reviewers suggested keeping her in the Homo genus.

In 2009, more remains were found, increasing the number of individuals represented by bones to 14. In 2015, a fifteenth individual, LB15, was identified through teeth. Stone tools found in the cave were believed to be made by these small humans. These tools were dated to between 95,000 and 13,000 years ago. Modern humans arrived in the region around 50,000 years ago, by which time Homo floresiensis is thought to have disappeared. Stone tools from the cave are similar to those made by modern humans in East Timor.

The fossils belong to Indonesia. In December 2004, Indonesian scientist Teuku Jacob, who had previously worked at Gadjah Mada University, removed most of the remains from their storage with permission from a director at the National Research Centre of Archaeology. He kept the bones for three months.

Jacob claimed the fossils did not represent a new species, suggesting LB1 was a small member of Homo sapiens who might have had a condition called microcephaly, which causes a very small head and brain. He also speculated she might have been a pygmy. Other scientists, including Professor Richard Roberts, criticized Jacob for keeping the fossils private, fearing important evidence would be hidden. Jacob returned the remains in February 2005, but many were damaged, and two leg bones were missing.

Scientists reported that the returned fossils were in poor condition. The discovery team leader, Morwood, noted the damage. Jacob denied wrongdoing, claiming the damage occurred during transport, despite evidence suggesting the jawbone was broken during a molding process.

In 2005, Indonesian officials closed access to the cave. Some media, like the BBC, suggested the restriction was to protect Jacob, who was called "Indonesia's king of palaeoanthropology," from being proven wrong. Scientists were allowed to return to the cave in 2007, shortly after Jacob's death.

Classification and evolution

Because of the deep Lombok Strait nearby, Flores remained an isolated island during times when sea levels were low. This meant that the ancestors of H. floresiensis could only reach the island by traveling across the ocean, likely by rafting. The oldest stone tools found on Flores are about 1 million years old. No stone tools have been found at sites older than 1.27 million years, which suggests that the ancestors of H. floresiensis arrived on the island after this time.

In 2016, fossil teeth and a partial jaw from hominins believed to be ancestors of H. floresiensis were discovered at Mata Menge, about 74 km (46 mi) from Liang Bua. These fossils are about 700,000 years old. Later, other remains, including a humerus, were found at Mata Menge and were directly linked to H. floresiensis. These remains are about the same size or slightly smaller than those found at Liang Bua, which suggests that the size of the species remained stable for hundreds of thousands of years until it went extinct.

Two main theories explain the origin of H. floresiensis. One theory suggests that H. floresiensis descended from a very early group of small, primitive humans outside Africa, before 1.75 million years ago. This idea is supported by the skeletal features of H. floresiensis, such as foot bones that resemble those of early humans like Australopithecus and Homo habilis, rather than Homo erectus. This theory has been supported by several scientific analyses.

Other scientists believe that H. floresiensis likely descended from a population of Homo erectus from Java that became isolated on Flores. The small body size of H. floresiensis may have resulted from insular dwarfism, a known evolutionary pattern in island animals. These scientists argue that H. floresiensis shares cranial and dental traits with Homo erectus, especially early Javanese Homo erectus. They also dispute some similarities to Australopithecus and Homo habilis, suggesting these might be the result of evolutionary changes.

Scientists have noted that there is no evidence of early humans in Java before 1.3–1.5 or 1.8 million years ago, with the earliest humans in Java being Homo erectus. There is also no evidence of Australopithecus or Homo habilis outside Africa, which makes it unlikely that H. floresiensis descended from these earlier hominins. The insular dwarfism theory is currently the most widely accepted explanation as of 2025.

In 2006, two teams tried to extract DNA from a tooth found in 2003 but failed. Researchers suggest this happened because the dentine was targeted, and new studies show that cementum contains more DNA. The heat from the drill may have also damaged the DNA.

The small brain size of H. floresiensis (417 cc) led some to suggest the specimens were modern humans with a birth defect, not a new species. These claims have been widely rejected.

Before fossils were removed, researchers used a CT scan of the LB1 skull and created a virtual model of the brain. They concluded the brain was not that of a pygmy or someone with a malformed skull. Others compared LB1’s skull to microcephalic human skulls and found it fell within the normal range. A 2006 study suggested LB1 might have descended from a pygmy population of modern humans but showed signs of microcephaly, while other remains from the cave showed small stature but not microcephaly.

In 2005, the original discoverers of H. floresiensis argued that skeptics had incorrectly linked the species’ height to microcephaly. Falk stated these claims lacked evidence. In 2006, researchers concluded the finds represent a new species. In 2007, Falk found H. floresiensis brains had a shape similar to modern humans, with well-developed frontal and temporal lobes, which would not be the case if they had microcephaly.

In 2008, researchers suggested LB1’s skull fell outside the range of human microcephalic skulls. However, a 2013 study showed microcephalic brain shapes vary widely and are not clearly different from normal brains. LB1’s brain shape aligned slightly more with microcephalic samples but still fell at the extreme edge of the normal range. A 2016 study found no signs of microcephaly or other pathologies in LB1’s skull and confirmed it is a separate species.

A 2007 study proposed that H. floresiensis may have had Laron syndrome, a condition causing short stature and small skulls. However, LB1’s brain size was much smaller than seen in Laron syndrome patients, and DNA analysis would be needed to confirm this.

In 2008, researchers suggested LB1 and LB6 had congenital iodine deficiency syndrome, which causes small bodies and brains. However, scans showed LB1’s pituitary fossa was not unusually large, and later studies found no evidence of this condition.

From 2006, some researchers claimed LB1 had Down syndrome, but other traits shared by H. floresiensis and early humans, like the absence of a chin, are not found in modern humans. A 2016 study concluded LB1 did not show enough Down syndrome features to support this diagnosis.

Anatomy

The most important and obvious features of Homo floresiensis are its small body size and small brain size. Brown and Morwood also noted other features that may help distinguish LB1 from modern humans, such as the shape of the teeth, the lack of a chin, and less twisting in the lower part of the upper arm bone. Scientists have studied these features closely, but different research groups have reached different conclusions about whether they support LB1 being a new species or if they suggest LB1 was a severely sick modern human.

A 2015 study compared the teeth of 40 Homo floresiensis individuals to 450 teeth from living and extinct human species. The study found that Homo floresiensis had "primitive" shapes in their canine and premolar teeth and "advanced" shapes in their molars. This combination of traits is unique among hominins.

Additional skeletons found later confirmed some features seen in LB1, such as the lack of a chin. However, some researchers, like Jacob and others, argue that these features do not clearly separate LB1 from modern humans living in the same area. Lyras and others used 3D measurements to show that LB1’s skull is very different from all modern human skulls, including those of small-bodied people and those with a condition called microcephaly. They also found that LB1’s skull is more similar to Homo erectus. Ian Tattersall believes Homo floresiensis should not be classified as a separate species because it is too old and different to belong to the Homo genus.

LB1’s height is estimated to have been about 1.06 meters (3 feet 6 inches). Another skeleton, LB8, is estimated to have been about 1.09 meters (3 feet 7 inches) tall. These sizes are much shorter than the average height of modern humans, even the smallest groups like the Mbenga and Mbuti (about 1.5 meters or 4 feet 11 inches) or the Andamanese (about 1.37 meters or 4 feet 6 inches). LB1’s body weight was estimated to be about 25 kilograms (55 pounds). LB1 and LB8 are also smaller than Australopithecus, such as the famous fossil "Lucy," which lived about 3 million years ago and was previously thought to have stayed in Africa. This suggests that LB1 and LB8 may be the smallest and shortest members of the human group ever found.

Their small size is likely due to a process called insular dwarfism, where animals shrink in size on islands with limited resources. In 2006, Indonesian scientist Teuku Jacob and colleagues noted that LB1’s size is similar to the Rampasasa pygmies who live on the island of Flores. However, a 2018 study concluded that the Rampasasa pygmies did not descend from Homo floresiensis, instead suggesting that dwarfism occurred separately in different species on Flores.

Besides their small size, Homo floresiensis resembles Homo erectus, a species that lived in Southeast Asia around the same time as Homo floresiensis.

In addition to their small body size, Homo floresiensis had a very small brain. LB1’s brain volume was about 380 cubic centimeters (23 cubic inches), similar to that of chimpanzees or Australopithecus. This is less than half the brain size of Homo erectus (about 980 cubic centimeters or 60 cubic inches). The brain-to-body size ratio of LB1 is between that of Homo erectus and great apes. Scientists believe this reduction in brain size is also due to insular dwarfism. A 2009 study found that the brain size of pygmy hippos in Madagascar shrank more than their body size, similar to the brain size reduction seen in Homo floresiensis.

Despite their small size, Homo floresiensis may have had similar cognitive abilities to modern humans. The Brodmann area 10 in the prefrontal cortex, which is linked to thinking, is about the same size in Homo floresiensis as it is in modern humans. Evidence also suggests Homo floresiensis used fire, hunted animals, and made stone tools.

The twist in the upper arm bone (humerus) of Homo floresiensis was less than in modern humans. In modern humans, the upper arm bone twists between 145 and 165 degrees, but in Homo floresiensis, it twisted about 120 degrees. This may have helped them swing their arms more easily. Their shoulder bones and short collarbones also shifted their shoulders forward, creating a posture similar to shrugging. This posture may have compensated for their limited arm movement, allowing their elbows to move similarly to modern humans. Their wrist bones were more like those of apes and Australopithecus, being smaller and more flexible than modern human wrist bones. These features lacked traits that evolved at least 800,000 years ago.

The leg bones of Homo floresiensis were stronger than those of modern humans. Their feet were unusually flat and large compared to the rest of their body. This would have forced them to bend their knees more when walking, creating a high-stepping, slow gait. Their toes were thin and long, and their big toes were nearly the same shape as the other toes.

Culture

The cave contained more than ten thousand stone tools, mostly sharp stone pieces, which is surprising because H. floresiensis had a small brain. Some scientists believe H. floresiensis learned to make tools by copying H. erectus. Tools such as points, perforators, blades, and small blades were found near the bones of Stegodon florensis, an extinct elephant-like animal. This has led some to suggest that H. floresiensis may have hunted young Stegodon. Similar tools found 50 kilometers (31 miles) south, near Stegodon and Komodo dragon bones, are thought to belong to an earlier group of H. erectus. Other scientists question whether H. floresiensis hunted Stegodon, pointing out that few bones show signs of being cut by tools. This may mean that H. floresiensis competed with predators like Komodo dragons, giant storks, and vultures for food. Instead, they may have mainly hunted giant rats, such as Papagomys, which were common at the site. Early claims that H. floresiensis used fire were later found to be incorrect.

Paleoecology

During the late Early Pleistocene to Late Pleistocene, before humans (Homo sapiens) arrived on Flores, the island had an ecosystem with few land animals. This included the extinct dwarf proboscidean (a type of elephant relative) Stegodon florensis. Many types of rats were present, such as the small Rattus hainaldi, the Polynesian rat, Paulamys, and Komodomys. Medium-sized rats included Hooijeromys, while giant rats like Papagomys and the extinct Spelaeomys were also found. These two giant rat species were about the size of rabbits and weighed between 1.3 to 5.5 pounds (600 to 2,500 grams). Other animals included the Komodo dragon and a smaller monitor lizard called Varanus hooijeri. Birds such as the giant stork Leptoptilos robustus and the vulture Trigonoceps were also part of the ecosystem.

Extinction

The youngest bones of H. floresiensis found in Liang Bua cave are about 60,000 years old, and the youngest stone tools are about 50,000 years old. Earlier estimates of 12,000 years ago were incorrect because of a hidden gap in the layers of rock and soil in the cave. The time when H. floresiensis disappeared from the cave layers is close to when modern humans arrived in the area. This timing could indicate that modern humans had a direct or indirect effect on H. floresiensis or the ecosystems of Flores. DNA tests of modern humans from Flores found no genetic material from H. floresiensis.

A 2025 study suggests that worsening climate conditions may have contributed to the disappearance of H. floresiensis from the Liang Bua area and the abandonment of the cave. Chemical evidence from Liang Bua shows a long-term drying trend that became stronger around 61,000 years ago. This period also saw less freshwater and a decline in Stegodon florensis insularis, a possible food source for H. floresiensis. This drying trend does not match the global extinction of H. floresiensis on Flores at that time. Instead, they may have moved to or remained in other parts of the island that were still livable.

"Hobbit" nickname

Homo floresiensis was quickly given the nickname "the hobbit" by the scientists who discovered it. This name came from the fictional people in J. R. R. Tolkien's book The Hobbit. Some of the scientists even suggested naming the species H. hobbitus.

In October 2012, a scientist from New Zealand who was planning to give a public lecture about Homo floresiensis was told by the Tolkien Estate that he could not use the word "hobbit" when promoting the lecture.

In 2012, a film studio in the United States called The Asylum planned to release a movie titled Age of the Hobbits. The film was about a group of H. floresiensis described as a "peace-loving" community that was "enslaved by the Java Men," a race of dragon-riding, meat-eating people. The movie aimed to benefit from the popularity of Peter Jackson's film The Hobbit: An Unexpected Journey. However, the film was blocked from being released due to a legal disagreement over the use of the word "hobbit." The Asylum claimed the film did not break Tolkien's copyright because it was about H. floresiensis, which scientists often call "Hobbits." Eventually, the movie was released under a new title: Clash of the Empires.