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Archaeology Some fossils become petrified, which means they turn to stone. Petrifaction occurs when rivers and streams carry dissolved minerals to the porous parts of bones, shells or wood. The minerals eventually crystallize and settle, filling the pores. Archaeologists are like police detectives. They search
for clues left behind by people, animals, and things. Archaeologists use
those clues to make |
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Archaeologists
are scientists who study history. They often study fossils. Fossils are
the remains of prehistoric plants or animals that somehow managed to be
preserved for thousands of years. We have many unanswered questions because
very few fossils have survived.
educated guesses about the past. What we know about prehistory changes
over time as archaeologists uncover new clues. We don’t know what
archaeologists will discover in the future. If the past is any guide,
what we think we know about prehistory will change as we learn more about
the past.