Here are the answers to your questions:
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What was one of the most significant contributions to the study of life science?
- The invention of the microscope
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What did the discovery of bacteria open up?
- A whole new field of study in microbiology
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What did early humans have a deep understanding of?
- The natural world around them
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What role did the study of nature play in the development of early civilizations?
- It led to the development of agriculture
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Who invented the microscope?
- Zacharias and Hans Janssen (Note: While Antonie van Leeuwenhoek is known for improving the microscope and for being the first to observe and describe bacteria, the original invention of the compound microscope is attributed to Zacharias and Hans Janssen.)