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Still others , such as fear of mice and insects , may be unique to humans and developed during the paleolithic and neolithic time periods ( when mice and insects become important carriers of infectious diseases and harmful for crops and stored foods ) .
 paleolithic, neolithic
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 paleolithic, neolithic