Machu Picchu was built by the Inca and rediscovered in 1911.
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Memories are reconstructed each time you recall them.
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The city of Jericho is one of the oldest known walled cities.
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Attention can be limited and easily distracted.
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Petra in Jordan was carved into rose-colored rock cliffs.
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Emotional experiences can leave stronger memories than neutral ones.
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Sinkholes can form when underground rock dissolves.
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The Panama Canal uses a system of locks to lift ships.
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The Ebbinghaus forgetting curve describes memory decay over time.
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