What is the most interesting thing you have seen under the microscope?

Question: What is the most interesting thing you have seen under the microscope?
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  interest
Asked by anon-330041 on 22 Jun 2022.
- Jack Monaghan answered on 22 Jun 2022:
  
  I’ve been looking at lots of different insects under the microscope this year. They look incredible under the microscope, you realise just how different they all are. My favourite is the fairy wasp family – they are the smallest insects in the world and look just like a speck of dust to the naked eye. But under the microscope they have amazing frilly wings that look like peacock feathers.

Question: What is the most interesting thing you have seen under the microscope?