Old Teeth in China Show How Early Humans Lived
Introduction
Scientists studied six old teeth from early humans in China. These teeth are 400,000 years old. The scientists wanted to see how these humans are related to other old groups.
Main Body
The scientists looked at proteins in the teeth. They did this because the DNA was too old and gone. They found proteins from five men and one woman. They found one special protein. Only these early humans had it. Modern humans and Neanderthals do not have this protein. They also found another protein. This protein is the same in these humans and a group called Denisovans. This means the two groups were likely related.
Conclusion
The study shows that early humans and Denisovans lived together and had children together in Asia.
Learning
The Power of "Too"
In the text, we see: "the DNA was too old and gone."
When we use too + adjective, it means something is 'more than we want' or 'more than is possible'. It usually creates a problem.
Simple Examples:
- The coffee is too hot (I cannot drink it).
- The shoes are too big (They fall off my feet).
- The book is too difficult (I cannot read it).
Word Swap: Modern vs. Old
Notice how the author compares two different times:
- Modern humans People living today.
- Early humans People from a long time ago.
If you want to describe something from the past, use Early or Old. If you want to describe something now, use Modern.