science

OH 24

OH 24 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 OH 24 rather than just read about it. In short: OH 24 (Olduvai Hominid No. 24) or Twiggy is a fossilized skull of the species Homo habilis. It was discovered in Olduvai Gorge, Tanzania by Peter Nzube in 1968.

Key takeaways

OH 24 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect OH 24 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of OH 24 from memory before moving on to harder problems.

Reference excerpt

OH 24 (Olduvai Hominid No. 24) or Twiggy is a fossilized skull of the species Homo habilis. It was discovered in Olduvai Gorge, Tanzania by Peter Nzube in 1968. The skull was found crushed almost flat and was therefore named after the famously skinny model of the time Twiggy. Estimated at 1.8 mya (million years old), the cranium was found crushed flat and cemented together with a mass coating of limestone. It is now a Smithsonian exhibit item.

Remnants

Originally, there was very little interest placed on the discovery of the skull, but after much effort by scientist Ron Clarke, the skull was finally reconstructed and examined thoroughly. Despite this effort, there still is a good deal of distortion from the fossilization processes that took place. The small cranial capacity estimated at 590-600 cc (cubic centimeters) is in part attributed to this cranial distortion. OH 24's face is described as being prognathic (projecting forward under the nose), as in other fossils from the Homo habilis family, but not quite to the extent of earlier Australopithecus species. Besides manifesting lesser prognathism than the australopithecines, OH 24 also portrays a larger cranial vault, indicating an expansion in brain size from its ancestor, and the reduction of facial prognathisim typical of the evolution of early Homo. The individual's third molars had erupted, which indicates that OH 24- "Twiggy" was an adult at death. Yet, these molars show no sign of wear (the points on the crowns of the teeth are still sharp, and show little sign of abrasion by rough food matter), indicating that this individual died soon after the eruption of these molars. Like the other fossils of Homo habilis, OH 24 also manifests the slightly small teeth set in a U-shaped arch.

Dispute

Being one of the oldest fossils of Homo habilis, OH 24 has been used to settle many disputes about splitting some of the early Homo fossils that have been found into Homo rudolfensis and Homo habilis, or lumping them together into one single species, Homo habilis. Some of the highly disputed fossils are KNM-ER 1813 which most agree is a female Homo habilis and KNM-ER 1470 which many argue has various anatomical differences to the previously known Homo habilis fossils that should make it be classified into the Homo rudolfensis species.

Gallery

See also List of fossil sites (with link directory) List of hominina (hominid) fossils (with images) KNM-ER 1813 KNM-ER 1470 OH 7

References

External links Media related to OH 24 at Wikimedia Commons Archaeology Info

Illustrations

Worked examples

Example 1 — a first encounter with OH 24

Start with the simplest possible case. Write down what OH 24 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 OH 24 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 OH 24 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 OH 24

In research: OH 24 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 OH 24 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: OH 24 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Fossils of Tanzania, Homo habilis fossils, Prehistoric Tanzania, so understanding it makes those chapters shorter.
In everyday life: Look for OH 24 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 OH 24 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what OH 24 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 OH 24 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is OH 24 in simple terms?

OH 24 (Olduvai Hominid No. 24) or Twiggy is a fossilized skull of the species Homo habilis. It was discovered in Olduvai Gorge, Tanzania by Peter Nzube in 1968.

Why does OH 24 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 OH 24?

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 OH 24.