Who first reported the presence of micro-organisms?

  • Hans Lippershey
  • Hooke and Leeuwenhoek
  • Hans Janssen
  • Marie Curie

Other Questions for You!

Which means "above" or "higher up"?

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In tennis, what is the name for a serve which cannot be returned?

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Image credit: Photo byfkfkrErbe, digital colorization by Christopher Pooley, both of USDA, ARS, EMU., Public domain, via Wikimedia Commons.