I can tell you the history of the Earth, but I am not a book. What am I?
Category: Science · Difficulty: hard
Hint: I am often studied in geology.
Answer
Geological strata
Explanation
Rock layers hold geological history and information about the Earth's past, making it the correct answer.
This is a hard science riddle — a tricky one that takes a little thought. The answer is Geological strata.
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