Giants, in the sense of a separate race of enormous humans, never existed. But the idea didn’t come from nowhere. Ancient people regularly unearthed massive bones that genuinely looked human, religious texts described beings of extraordinary size, and rare medical conditions have produced individuals well over seven feet tall throughout recorded history. The real story of giants is about how fossils, genetics, folklore, and outright fraud wove together to create one of humanity’s most persistent beliefs.
Why Ancient People Believed in Giants
For most of human history, people had no framework for understanding fossils. When they dug up the enormous teeth and leg bones of mammoths and mastodons, the most logical explanation was that these remains belonged to giant humans. Saint Augustine, writing in the 400s A.D., described finding a human-looking molar on the shore of Utica that he estimated could have been divided into a hundred normal-sized teeth. He concluded it must have belonged to a giant. Over a thousand years later, the Jesuit scholar Athanasius Kircher published illustrations of mammoth bones labeled as the skeletons of giant men.
These misidentifications weren’t rare or fringe. A French biblical scholar named Calmut argued that mastodon bones exhibited in Europe were the remains of a king named Teutobocus. A Spanish priest named Father Torrubia displayed mammoth bones as the remains of pre-flood giants. The Puritan minister Increase Mather sent similar bones from the American colonies to England with the same interpretation. In colonial New England, a minister named Ezra Stiles wrote that enormous bones dug up at several sites “truly belong to an Animal Race in the shape of Men, called Giants in the Scriptures.” Each discovery reinforced the belief, because no one yet understood that elephants and their relatives had once roamed Europe and North America.
Giants in Religious Texts
The Hebrew Bible mentions the Nephilim, a word sometimes translated directly as “giants” and sometimes interpreted as “the fallen ones,” from the Hebrew word “naphal,” meaning to fall. The Book of Numbers describes people of great size, and the First Book of Enoch explicitly calls the Nephilim giants. These passages were taken literally for centuries, and the fossil discoveries seemed to confirm them. Christians across Europe and the Americas welcomed each new find of oversized bones as proof of biblical truth.
This created a feedback loop: scripture said giants existed, enormous bones kept turning up, and each piece of “evidence” validated the other. It took the development of comparative anatomy and paleontology in the 1700s and 1800s to finally separate elephant fossils from human mythology.
The Cardiff Giant and Other Hoaxes
By the 1800s, public fascination with giants was so intense that it became profitable to fake them. The most famous case is the Cardiff Giant, unearthed on October 16, 1869, on a farm in Cardiff, New York. Two laborers digging a well hit stone three feet down, cleared the soil, recognized the shape of a foot, and eventually uncovered a ten-foot-tall stone figure of a man. Crowds paid to see it, and many believed it was a petrified ancient giant.
The whole thing was a setup. The farm’s owner, William Newell, had buried the statue the year before. His cousin George Hull, an atheist and amateur science enthusiast, had carved it to make a point about the tension between science and religious faith. Hull wasn’t wealthy, and the scheme was also designed to make money, which it did. The giant became so popular that P.T. Barnum offered to buy it. When the owners refused, Barnum simply made a replica and displayed that instead, claiming his was the real one. The owners tried to sue, but the judge reportedly said, “Bring your giant here, and if he swears to his own genuineness, you shall have your injunction.” By December 1869, Hull confessed, and the hoax collapsed.
The Largest Primate That Actually Existed
While no giant humans ever walked the earth, a genuinely enormous primate did. Gigantopithecus blacki lived in subtropical Asia from about 2 million years ago until roughly 330,000 years ago. Based on its unusually large molars and jaw fragments found in caves across southern China, researchers estimate it stood about 3 meters tall (nearly 10 feet) and weighed between 200 and 300 kilograms (440 to 660 pounds). It is the largest primate ever to have existed.
Gigantopithecus was an ape, not a human ancestor. Its fossils have been found primarily in Guangxi province in southern China, with earlier evidence of a wider range across several Chinese provinces. A 2024 study published in Nature found that by the end of its existence, its range had shrunk dramatically, likely due to changes in its forest habitat. It went extinct long before modern humans arrived in the region.
Why Human Bodies Can’t Scale Up
Physics puts a hard limit on how large a human-shaped body can get. The constraint is called the square-cube law: when you double someone’s height, their bone strength (which depends on cross-sectional area) increases by a factor of four, but their body mass (which depends on volume) increases by a factor of eight. A person scaled up to 12 feet tall with normal human proportions would have bones that simply couldn’t support their weight. Their heart would struggle to pump blood against gravity to a brain twice as far from the ground. Their joints would fail under loads they were never shaped to bear.
A truly giant humanoid would need radically different proportions: much thicker legs, a more compact torso, a far more powerful heart. It wouldn’t look like a scaled-up person. It would look like a different creature entirely.
The Tallest Verified Humans
The tallest person in recorded medical history was Robert Wadlow of Alton, Illinois, who reached 8 feet 10.3 inches and 491 pounds before his death in 1940 at age 22. His extraordinary height resulted from a pituitary gland that produced far too much growth hormone. His growth began accelerating in early childhood, and he never stopped growing. Wadlow needed leg braces to walk and had limited sensation in his feet, which ultimately contributed to his death from an infection.
Wadlow’s condition, pituitary gigantism, occurs when a tumor on the pituitary gland triggers overproduction of growth hormone before the growth plates in the bones have closed. When the same process happens in adults, it’s called acromegaly, and instead of increasing height, it causes thickening of the hands, feet, and facial bones, along with joint pain, diabetes, high blood pressure, and heart problems. Both conditions illustrate that extreme human height is not a sign of robust health. It’s a medical emergency.
How Tall Humans Actually Get
Average human height varies enormously across populations, driven by both genetics and nutrition. The global average for men born in 1996 is about 171 cm (5 feet 7 inches), and for women, 159 cm (5 feet 3 inches). But the range across populations spans nearly 40 cm for men: from central African pygmy groups averaging around 145 cm (4 feet 9 inches) to populations in the Dinaric Alps of southeastern Europe averaging over 184 cm (just over 6 feet).
The tallest young men in the world right now come from a belt stretching along the Adriatic coast of Croatia through Herzegovina into central Montenegro, where average heights for 18-year-olds exceed 184 cm. Young men from Dalmatia average 183.7 cm, Herzegovina 183.4 cm, and Montenegro 182.9 cm, putting them on par with the Dutch, long considered the world’s tallest population. Researchers have linked this regional height to an unusually high frequency of a specific male-lineage genetic marker (Y haplogroup I-M170) that traces back to groups who expanded out of an Adriatic refugium after the last ice age. In Herzegovina, this lineage is found in over 70% of men.
Human height has also fluctuated dramatically over the millennia. Hunter-gatherers before the invention of agriculture were relatively tall. The shift to farming about 10,000 years ago actually made people shorter, likely due to less diverse diets and increased disease from living in dense settlements. Height didn’t recover until the Bronze Age, around 5,000 years ago, and in many populations didn’t reach pre-agricultural levels until the 20th century with improvements in nutrition and sanitation. A tall hunter-gatherer encountering shorter early farmers could easily have seemed like a giant, and that height gap may have fed into early oral traditions about enormous people from a previous age.