Until recently, the typical viruses known to science were 20 – 150 nm in size.
In 2003, the Mimivirus was discovered with a size of approximately 680 nm.
In 2013, the Pandoravirus was discovered which has a size of over 1000 nm.
Which viruses can be seen using both a light microscope with a maximum resolution of 0.25 μm
and an electron microscope?