biology

Robert Wadlow

Robert Wadlow is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Robert Wadlow rather than just read about it. In short: Robert Pershing Wadlow (February 22, 1918 – July 15, 1940), also known as the Alton Giant and the Giant of Illinois, was an American man known for being the tallest person in recorded history for whom there is irrefutable evidence. Wadlow was born and raised in Alton, Illinois, a small city near St.

Key takeaways

Robert Wadlow belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Robert Wadlow to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Robert Wadlow from memory before moving on to harder problems.

Reference excerpt

Robert Pershing Wadlow (February 22, 1918 – July 15, 1940), also known as the Alton Giant and the Giant of Illinois, was an American man known for being the tallest person in recorded history for whom there is irrefutable evidence. Wadlow was born and raised in Alton, Illinois, a small city near St. Louis, Missouri. Wadlow's height was 8 ft 11.1 in (2.72 m) while his weight reached 439 lb (199 kg) at his death at age 22. His great size and his continued growth in adulthood were due to hypertrophy of his pituitary gland, which results in an abnormally high level of human growth hormone (HGH).

Early life

Wadlow was born in Alton, Illinois, on February 22, 1918, to Harold Franklin and Addie May (Johnson) Wadlow, with a typical birth weight of 8 lb 5 oz (3.77 kg) and was the oldest of five children. He was taller than his father by age 8, and in elementary school a special desk was made for him. His pituitary gland condition was diagnosed at the age of twelve. At the time, corrective surgery was dangerous and not guaranteed to work, so his parents decided against intervening. He attended Alton High School, where he was involved in the German Club and Camera Club. By the time of his graduation in 1936, he was 8 ft 4 in (254 cm). He enrolled in Shurtleff College with the intention of studying law.

Adulthood

Wadlow required leg braces when walking and had little feeling in his legs and feet, but he never used a wheelchair. Wadlow became a celebrity after his 1936 U.S. tour with the Ringling Brothers Circus, appearing at Madison Square Garden and the Boston Garden in the center ring (never in the sideshow). During his appearances, he dressed in his everyday clothes and refused the circus's request that he wear a top hat and tails. In 1938, he began a promotional tour with the International Shoe Company, which provided him shoes free of charge, again only in his everyday street clothes. Wadlow saw himself as working in advertising, not exhibiting as a freak. He possessed great physical strength until the last few days of his life. Wadlow belonged to the Order of DeMolay, the Masonic-sponsored organization for young men, and was later a Freemason. By November 1939, Wadlow was a Master Mason under the jurisdiction of the Grand Lodge of Illinois A.F.& A.M. One year before his death, Wadlow passed John Rogan as the tallest person ever recorded. On June 27, 1940 (18 days before his death), he was measured by doctors at 8 ft 11.1 in (2.72 m).

Death On July 4, 1940, during a professional appearance at the Manistee National Forest Festival, a faulty brace irritated his ankle, leading to infection. He was treated with a blood transfusion and surgery, but his condition worsened and he died in his sleep on July 15. His coffin measured 10 ft 9 in (3.28 m) long by 2 ft 8 in (0.81 m) wide by 2 ft 6 in (0.76 m) deep, weighed over 1,000 lb (450 kg), and was carried by twelve pallbearers and eight assistants. He was buried at Oakwood Cemetery in Alton, Illinois.

Legacy A life-size statue of Wadlow was erected opposite the Alton Museum of History and Art in 1986. He is one of the Guinness World Records ICONS of 2025. Exhibits dedicated to Wadlow are featured in many Ripley's Believe It or Not! attractions, each featuring a life-size wax or animatronic figure of him.

Height chart

See also Acromegaly Gigantism List of tallest people Trijntje Keever, the alleged tallest woman in recorded history Zeng Jinlian, the tallest woman officially confirmed by Guinness World Records in recorded history Sultan Kösen, the tallest man alive Siddiqa Parveen Adam Rainer, the only known human ever to be documented as both a dwarf and a giant

References

Illustrations

Worked examples

Example 1 — a first encounter with Robert Wadlow

Start with the simplest possible case. Write down what Robert Wadlow claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Robert Wadlow before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Robert Wadlow ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Robert Wadlow

In research: Robert Wadlow appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Robert Wadlow in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Robert Wadlow is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1918 births, 1940 deaths, 20th-century American people, so understanding it makes those chapters shorter.
In everyday life: Look for Robert Wadlow outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Robert Wadlow in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Robert Wadlow means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Robert Wadlow out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Robert Wadlow in simple terms?

Why does Robert Wadlow matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Robert Wadlow?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Robert Wadlow.