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Ancient Rodent May Have Weighed 30 Kilograms

Teeth helped scientists estimate the animal’s size.

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Science news editorial illustration for Fossil Teeth Point to a Giant Rodent in Ancient Thailand

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from a in . The 34 , on 10.

They it 30 . The do not its .

Source: McGill University, 2026-11-10.

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Try 2 questions about this story, then explain one idea in your own words. Check the text whenever you need to.

In this lesson: Identify the fossil evidence and the difference between approximate and exact weight.

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Read and understand · 1/2What fossils did researchers find?

Read the answer and explanation

Teeth. The opening paragraph identifies fossil teeth.

Clue: Researchers found fossil teeth from a giant rodent in southern Thailand. The animal lived about 34 million years ago, McGill reported on November 10.

Read and understand · 2/2What do the teeth not reveal?

Read the answer and explanation

The exact weight. The second paragraph explicitly states the weight is not exact.

Clue: They estimate it weighed around 30 kilograms. The teeth do not reveal its exact weight.

Grammar in this story: An approximate value

around 30 kilograms

Around means approximately; it does not make 30 kilograms an exact measurement.

Your turn

Explain what was found and how heavy the animal may have been.

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Researchers found fossil teeth from a giant rodent in southern Thailand. They estimate that it weighed around 30 kilograms, but its exact weight is unknown.

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