Ancient proteins give a clearer picture of the Denisovan face
Scientists used ancient proteins from Chinese fossils to link Denisovans to a distinct skull shape, suggesting they lived across a wider area.
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Scientists in China say they now have a clearer idea of what Denisovans looked like. The study appeared in the journal Nature on October 21. The team looked at 20 fossils from a site called Xujiayao in northern China. The bones are between 138,000 and 199,000 years old, and for years experts argued about which kind of early human they belonged to.
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Scientists in China they now have a clearer idea of what Denisovans looked like.
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The old bones had no usable DNA, so the researchers studied proteins instead. They found 18 ancient proteins in two of the fossils. One of them carried a small change that had only been seen in known Denisovans, not in Neanderthals or modern people. That tied the fossils to the Denisovans. The team then compared the skull pieces with other fossils from East Asia, including a nearly complete skull from the city of Harbin. They describe a low, wide skull with thick bone, a heavy brow ridge, flat cheeks and a face that did not stick out much.
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The then compared the skull pieces with other fossils from East Asia, including a nearly complete skull from the city of Harbin.
team "team" is a singular noun, so it fits the gap.
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The picture is not a portrait of one person. The Xujiayao bones do not include complete face bones, so the face is built from patterns seen in several fossils. Experts say more samples are needed to test it. Denisovans were first known from DNA in a finger bone found in a Siberian cave in 2010. If the new study is right, some fossils from across East Asia may belong to the same group, which would mean Denisovans lived over a much wider area than people thought.
Topics Science
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- Step 1Choose your app: ChatGPT or Claude.
- Step 2Press its voice button.
- Step 3Answer 4–5 questions out loud.
The assistant's questions
- What did scientists study instead of DNA?
- What did the skull of the Denisovans look like?
- Do you think old bones can tell us a lot about the past?
- Have you ever visited a museum with old bones or fossils?
- If you found an old bone, what would you do with it?
Questions to ask the assistant
- Do you think this discovery is important?
- Did you know about Denisovans before?
- Why do scientists study old bones?
Nothing to say? Start like this
- I think that...
- In my opinion...
- For example...
- I don't know, but maybe...
Words from the text
- bone a hard part inside a body The dog found a bone in the garden.
- wide big from one side to the other The river is very wide here.
- expert a person who knows a lot about something She is an expert in math.
- protein a small part inside the body that scientists can study Eggs have a lot of protein.
- carry to have or hold something She carries a bag to school every day.
- build to make something from parts They built a new house last year.
The assistant's questions
- Why did scientists study proteins instead of DNA in these old bones?
- What did the scientists say the Denisovan skull and face looked like?
- Do you find stories about ancient humans interesting? Why or why not?
- Have you ever visited a museum with old bones or fossils?
- If scientists found more fossils tomorrow, what new question would you want them to answer?
Questions to ask the assistant
- Do you know anything else about Denisovans or Neanderthals?
- Why do you think DNA disappears from very old bones?
- Would you like to work as a scientist studying ancient fossils?
Nothing to say? Start like this
- I think that...
- From what I remember, the article said...
- In my opinion...
- I'm not sure, but maybe...
- Honestly, I've never thought about...
Words from the text
- bone a hard part inside a body The dog buried a bone in the garden.
- expert a person who knows a lot about something She is an expert in computer programming.
- protein a small substance found in the body and food Eggs and meat contain a lot of protein.
- belong to be a member or part of a group This book belongs to my sister.
- ancient very old, from a long time ago We visited an ancient castle last summer.
- describe to say what something is like Can you describe your favorite movie to me?
The assistant's questions
- Why did the researchers study proteins instead of DNA in these fossils?
- What physical features did the scientists use to describe the Denisovan skull?
- Do you find it surprising that a single protein change could identify an entire human species?
- Have you ever visited a museum exhibit about human evolution or ancient humans?
- If scientists found a complete Denisovan skeleton tomorrow, what would you most want to know about them?
Questions to ask the assistant
- How reliable is protein analysis compared to DNA analysis for identifying ancient species?
- Why do you think it took so long to figure out that Denisovans had this skull shape?
- Do you think there could be other human species we haven't discovered yet?
Nothing to say? Start like this
- I think that...
- What strikes me most is...
- From what I understand...
- It's hard to say, but...
- One thing I find interesting is...
Words from the text
- fossil the hardened remains of a very old plant or animal Paleontologists discovered a new fossil buried deep in the rock layer.
- skull the bones of the head that protect the brain The archaeologist carefully brushed dirt away from the ancient skull.
- belong to be a member of a particular group or category This painting belongs to a private collector, not a museum.
- ridge a raised, narrow line or edge on a surface A sharp ridge of rock ran along the top of the mountain.
- cheek the soft part of the face below the eye Her cheeks turned red when everyone started clapping for her.
- researcher a person who studies a subject carefully to discover new facts A team of researchers spent years analyzing the climate data.
Show the prompt
# Speaking practice: Ancient proteins give a clearer picture of the Denisovan face
You are my friendly English conversation partner. We talk by voice, so keep every reply short: one to three sentences. Speak English only.
About me: I am a beginner (CEFR A1-A2): use short simple sentences, common everyday words and the present and past simple.
The text we talk about is called “Ancient proteins give a clearer picture of the Denisovan face”. Scientists in China studied old bones from a place called Xujiayao. They found ancient proteins in the bones, not DNA. This helped them connect the bones to a group of early humans called Denisovans, and now they have a better idea of what their face and skull looked like.
The conversation has three stages:
- 1. The text: start with the first questions, which are about what the text says.
- 2. Me: move on to the later questions, which are about my own experience and opinion.
- 3. The end: when I say we are done, or after the last question, stop asking and give the report below.
Ask me these questions in this order, one at a time. Wait for my answer and react to it in a few words before the next one.
1. What did scientists study instead of DNA?
2. What did the skull of the Denisovans look like?
3. Do you think old bones can tell us a lot about the past?
4. Have you ever visited a museum with old bones or fossils?
5. If you found an old bone, what would you do with it?
If I get stuck, give me one of these sentence starters or make the question easier:
- I think that...
- In my opinion...
- For example...
- I don't know, but maybe...
Target words. Use them naturally in your own replies and ask questions that make me want to use them:
- bone: a hard part inside a body Example: The dog found a bone in the garden.
- wide: big from one side to the other Example: The river is very wide here.
- expert: a person who knows a lot about something Example: She is an expert in math.
- protein: a small part inside the body that scientists can study Example: Eggs have a lot of protein.
- carry: to have or hold something Example: She carries a bag to school every day.
- build: to make something from parts Example: They built a new house last year.
If I ask what a word means, answer in simple English with a short example. Say the word in my native language only if I ask a second time.
If I go off the topic, answer in one sentence, then bring me back to the question we were on.
Rules:
- Do not correct me while I speak. Let me finish my thought.
- Quietly keep a list of my mistakes and of the new words I used or needed.
- Report: my mistakes with the corrected sentences, which target words I used and which I did not (with a short meaning of each one I did not), and one thing to practise next.
Start now with the first question.
# Speaking practice: Ancient proteins give a clearer picture of the Denisovan face
You are my friendly English conversation partner. We talk by voice, so keep every reply short: one to three sentences. Speak English only.
About me: I am an intermediate learner (CEFR B1-B2): I can talk about experiences and opinions, with some mistakes.
The text we talk about is called “Ancient proteins give a clearer picture of the Denisovan face”. Scientists in China studied ancient fossils from a site called Xujiayao because nobody was sure what kind of early human they were. Since the bones had no DNA, researchers looked at ancient proteins instead and found a link to the Denisovans. This helped them describe a Denisovan face and skull shape for the first time, suggesting Denisovans lived across a much wider area than scientists thought.
The conversation has three stages:
- 1. The text: start with the first questions, which are about what the text says.
- 2. Me: move on to the later questions, which are about my own experience and opinion.
- 3. The end: when I say we are done, or after the last question, stop asking and give the report below.
Ask me these questions in this order, one at a time. Wait for my answer and react to it in a few words before the next one.
1. Why did scientists study proteins instead of DNA in these old bones?
2. What did the scientists say the Denisovan skull and face looked like?
3. Do you find stories about ancient humans interesting? Why or why not?
4. Have you ever visited a museum with old bones or fossils?
5. If scientists found more fossils tomorrow, what new question would you want them to answer?
If I get stuck, give me one of these sentence starters or make the question easier:
- I think that...
- From what I remember, the article said...
- In my opinion...
- I'm not sure, but maybe...
- Honestly, I've never thought about...
Target words. Use them naturally in your own replies and ask questions that make me want to use them:
- bone: a hard part inside a body Example: The dog buried a bone in the garden.
- expert: a person who knows a lot about something Example: She is an expert in computer programming.
- protein: a small substance found in the body and food Example: Eggs and meat contain a lot of protein.
- belong: to be a member or part of a group Example: This book belongs to my sister.
- ancient: very old, from a long time ago Example: We visited an ancient castle last summer.
- describe: to say what something is like Example: Can you describe your favorite movie to me?
If I ask what a word means, answer in simple English with a short example. Say the word in my native language only if I ask a second time.
If I go off the topic, answer in one sentence, then bring me back to the question we were on.
Rules:
- Do not correct me while I speak. Let me finish my thought.
- Quietly keep a list of my mistakes and of the new words I used or needed.
- Report: my mistakes with the corrected sentences, which target words I used and which I did not (with a short meaning of each one I did not), and one thing to practise next.
Start now with the first question.
# Speaking practice: Ancient proteins give a clearer picture of the Denisovan face
You are my friendly English conversation partner. We talk by voice, so keep every reply short: one to three sentences. Speak English only.
About me: I am an advanced learner (CEFR C1-C2): I am fluent and want precise vocabulary and nuance.
The text we talk about is called “Ancient proteins give a clearer picture of the Denisovan face”. Scientists in China analyzed ancient proteins from 20 fossils found at the Xujiayao site to identify them as Denisovan remains, since the bones were too old for DNA analysis. By comparing these skull fragments with other East Asian fossils, including one from Harbin, they built a composite picture of a low, wide skull with a heavy brow ridge and flat cheeks, suggesting Denisovans may have lived across a much wider area than previously thought.
The conversation has three stages:
- 1. The text: start with the first questions, which are about what the text says.
- 2. Me: move on to the later questions, which are about my own experience and opinion.
- 3. The end: when I say we are done, or after the last question, stop asking and give the report below.
Ask me these questions in this order, one at a time. Wait for my answer and react to it in a few words before the next one.
1. Why did the researchers study proteins instead of DNA in these fossils?
2. What physical features did the scientists use to describe the Denisovan skull?
3. Do you find it surprising that a single protein change could identify an entire human species?
4. Have you ever visited a museum exhibit about human evolution or ancient humans?
5. If scientists found a complete Denisovan skeleton tomorrow, what would you most want to know about them?
If I get stuck, give me one of these sentence starters or make the question easier:
- I think that...
- What strikes me most is...
- From what I understand...
- It's hard to say, but...
- One thing I find interesting is...
Target words. Use them naturally in your own replies and ask questions that make me want to use them:
- fossil: the hardened remains of a very old plant or animal Example: Paleontologists discovered a new fossil buried deep in the rock layer.
- skull: the bones of the head that protect the brain Example: The archaeologist carefully brushed dirt away from the ancient skull.
- belong: to be a member of a particular group or category Example: This painting belongs to a private collector, not a museum.
- ridge: a raised, narrow line or edge on a surface Example: A sharp ridge of rock ran along the top of the mountain.
- cheek: the soft part of the face below the eye Example: Her cheeks turned red when everyone started clapping for her.
- researcher: a person who studies a subject carefully to discover new facts Example: A team of researchers spent years analyzing the climate data.
If I ask what a word means, answer in simple English with a short example. Say the word in my native language only if I ask a second time.
If I go off the topic, answer in one sentence, then bring me back to the question we were on.
Rules:
- Do not correct me while I speak. Let me finish my thought.
- Quietly keep a list of my mistakes and of the new words I used or needed.
- Report: my mistakes with the corrected sentences, which target words I used and which I did not (with a short meaning of each one I did not), and one thing to practise next.
Start now with the first question.
Type the answer
Scientists in China they now have a clearer idea of what Denisovans looked like.
Did you get it right?
1–3 pick a word Enter check / continue Esc skip
Type the answer
The are between 138,000 and 199,000 years old, and for years experts argued about which kind of early human they belonged to.
Did you get it right?
1–4 pick a word Enter check / continue Esc skip
Type the answer
One word is in the wrong form: “appear”. Type the correct form of that word.
The study appear in the journal Nature on October 21.
Did you get it right?
Enter check / continue Esc skip
Choose the form
The then compared the skull pieces with other fossils from East Asia, including a nearly complete skull from the city of Harbin.
team "team" is a singular noun, so it fits the gap.
1–4 pick Enter check / continue Esc skip
Type the answer
The bones had no usable DNA, so the researchers studied proteins instead.
Did you get it right?
1–4 pick a word Enter check / continue Esc skip
Choose the form
The bones had no usable DNA, so the researchers studied proteins instead.
old "old" is an adjective, so it fits the gap.
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Put in order
Tap the words in the order of the sentence.
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