Early scientists helped us learn a lot about cells. Here are some important contributions they made:

• Microscopes: People like Leeuwenhoek created better microscopes. This allowed us to see cells for the very first time.
• Cell Theory: In the 1800s, scientists named Schlieden and Schwann came up with the idea that all living things are made of cells. This was a big step in understanding how cells work.
• Research: Another scientist, Virchow, pointed out that new cells come from existing cells. This added to our overall understanding of cell theory.

These discoveries helped us see that cells are the building blocks of life!