Because he is...
One of the inventions of Anton Van Leeuwenhoek is the Microscope
It is so small he needs a microscope to find it.
yes they are so small you need a microscope to see them.
who made the first microscope?Anton van Leeuwenhoek (LAY-vin-hook) some time after 1632.The Dutch father and son team Jansen made a microscope in the 1590s, so were probably the first to do this.
It was developed, and then you might say improved or modified over time. Zaccharias Janssen and Hans Janssen experimented with lenses that would help make the light microscope, as did Galileo. Anton van Leeuwenhoek also experimented with microscopes and so did Robert Hooke.
The instrument used to make extremely small things look larger so humans can see them is a microscope.
Anton Van Leeuwenhoek invented a simple microscope.
The word microscopic is an adjective, a word that describes a noun as so small as to be visible only with a microscope; extremely small.
Micro means small or little, and a microscope is used to see small or little objects that can't be seen with the naked eye be visible.
Microscopic means too small to see with the unaided eye, so you need to use a microscope to see it.
Bacteria can only be seen with the aid of a microscope, as they are typically very small and not visible to the naked eye. A compound light microscope or an electron microscope is commonly used to observe and study bacteria.
Protons, electrons and neutrons are what make up an atom. Atoms are so small they cannot even been seen under a microscope.