science

Xujiayao

Xujiayao is a science 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 Xujiayao rather than just read about it. In short: Xujiayao, located in the Nihewan Basin in China, is an early Late Pleistocene paleoanthropological site famous for its archaic hominin fossils. Location Xujiayao is located on the west bank of the Liyi River, a tributary of the Sanggan River.

Key takeaways

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

Reference excerpt

Xujiayao, located in the Nihewan Basin in China, is an early Late Pleistocene paleoanthropological site famous for its archaic hominin fossils.

Location Xujiayao is located on the west bank of the Liyi River, a tributary of the Sanggan River. Xujiayao actually consists of two sites, Locality 73113 and Locality 74093. Locality 73113 is located near Xujiayao village in Yanggao County, Shanxi, while Locality 74093 is located near Houjiayao village in Yangyuan County, Hebei. Most of the fossils and artefacts were found at Locality 74093.

Discovery and excavations Xujiayao was discovered by researchers from the Institute of Vertebrate Paleontology and Paleoanthropology (IVPP) in 1974. IVPP carried out excavations in 1976, 1977, and 1979. Later excavations, in 2007 and 2008, were carried out by the Hebei Provincial Institute of Cultural Relics.

The Xujiayao hominin (designated Homo juluensis in 2024)

Twenty hominid fossils were discovered at Xujiayao, consisting of 12 parietal bones, 1 temporal bone, 2 occipital bones, 1 mandibular bone fragment, 1 juvenile maxilla, and 3 isolated teeth. The fossils remains at Xujiayao are difficult to classify and are of an uncertain taxonomic lineage, possibly representing a distinct hominin lineage. Wu & Bae (2024) designated the Xujiayao hominin fossils as the holotype of the species Homo juluensis, scientific name of the species translates from Chinese to "Big-headed Human" proposed to also include Pleistocene hominins from the Lingjing (Xuchang), Xiahe and Penghu sites, as well as Denisovans and possibly an individual from the Tam Ngu Hao 2 Cave in Laos. The fossil remains were recovered from the Xujiayao site. The findings from the site are attributed to the early Late Pleistocene in Marine Isotope Stages 5 to 4 (MIS 4 begins at 71 thousand years ago and MIS 5 begins at 130 thousand years ago). The Xujiayao fossils are characterized by a mix of Homo erectus and Homo sapiens features. The skulls also have a thick cranial vault, at the upper range of Homo erectus pekinensis. The maxilla exhibits features more typical of modern Homo sapiens. Dental analysis shows that the Xujiayao hominin appears to retain many archaic features found in hominin fossils, such as Homo pekinensis, from the Early and Middle Pleistocene in East Asia, share more similarities with these earlier East Asian hominins, and share some similarities with Neanderthals. While fossil sample Xujiayao 15 had mostly non-Neanderthal features appearance-wise, a CT scan revealed that the inner ear, surprisingly, was arranged in a way that was typical of Neanderthal inner ears. One of the fossil samples, Xujiayao 11, had an enlarged parietal foramen (a hole in the skull), an extremely rare abnormality that is found in less than 1 out of 25,000 cases in modern humans. Xujiayao 11 is the oldest hominin fossil to exhibit this abnormality. In terms of brain capacity, "Researchers reconstructed a complete skull of Xujiayao Man for the first time and estimated that the cranial capacity of the ancient relative of modern humans reached 1,700 cubic centimeters" and "The average brain capacity of modern humans is about 1,400 cc and the normal range is from 1,100 cc to 1,700 cc, "

Fauna Around 5000 specimens from twenty-one distinct species are represented at Xujiayao. The large majority of the remains belong to Przewalski's horse and Equus hemionus. The next most common remains belong to Coelodonta, Spirocerus (Xujiayao antelope/Spirocerus hsuchiayaocus and Pei's antelope/Spirocerus peii), Procapra and Gazella. Some red deer, sika deer and pig remains were also found. The Xujiayao hominin excelled as horse hunters, having regular access to animal protein, primarily coming from equids.

Artefacts

Almost 30,000 lithic, bone and antler artefacts were also unearthed at Xujiayao. Tools found at Xujiayao include scrapers, points, gravers, anvils, chopper and spheroids. Over 50% of the artefacts consist of finished tools. Over 40% of the artefacts consist of scrapers. The artefacts there include the presence of over 1000 stone spheroids, the most of any Paleolithic site in China.

References

Bibliography

Illustrations

Worked examples

Example 1 — a first encounter with Xujiayao

Start with the simplest possible case. Write down what Xujiayao claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Xujiayao 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 Xujiayao 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 Xujiayao

In research: Xujiayao appears in science 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 Xujiayao 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: Xujiayao is common in secondary-school and first-year university syllabi. It links to neighbouring topics Major National Historical and Cultural Sites in Shanxi, Paleoanthropological sites, Paleolithic sites in China, so understanding it makes those chapters shorter.
In everyday life: Look for Xujiayao 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 Xujiayao in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Xujiayao 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 Xujiayao out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Xujiayao in simple terms?

Xujiayao, located in the Nihewan Basin in China, is an early Late Pleistocene paleoanthropological site famous for its archaic hominin fossils. Location Xujiayao is located on the west bank of the Liyi River, a tributary of the Sanggan River.

Why does Xujiayao matter?

Because it connects several science 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 Xujiayao?

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 Xujiayao.