Scientists

1
Scientists
2
Hans Zacharias Janssen

• Date of discovery
• 1590
• Contribution
• Father son created the first microscope.
• It consisted of a long tube with a lens at each
  end.
• Instrument(s) Used
• n/a

3
Robert Hooke

• Date of discovery
• 1665
• Contribution
• First person to use the word cell
• Used it when describing the small chambers he saw
  in cork
• Instrument(s) Used
• Microscope

4
Anton von Leeuwenhoek

• Date of discovery
• 1683
• Contribution
• Discovered single-celled organisms that we now
  call Protozoa
• Found these while looking at pond water
• Instrument(s) Used
• Microscope

5
Matthias Schliedan

• Date of discovery
• 1838
• Contribution
• Discovered that all plants are made up of cells
• Later w/ Theodor Schwann helped develop the part
  of the cell theory which states that All living
  things are composed of cells
• Instrument(s) Used
• Microscope

6
Theodor Schwann

• Date of discovery
• 1839
• Contribution
• Discovered that all animals are composed of cells
• Later w/ Mathhias Schleidan helped develop the
  part of the cell theory which states that All
  living things are composed of cells
• Instrument(s) Used
• Microscope

7
Rudolph Virchow

• Date of discovery
• 1855
• Contribution
• Given credit for discovering the cell theory
• Stated that all cells come from pre-existing
  cells.
• Instrument(s) Used
• Microscope

8
Louis Pasteur

• Date of discovery
• 1878
• Contribution
• Discovered the process of pasteurization in which
  you can kill micro-organisms by heating
• Also invented vaccines
• Instrument(s) Used
• Microscope

9
Robert Koch

• Date of discovery
• 1880s
• Contribution
• Expanded on Pasteurs work and was able to link
  one microbe (or germ) with one specific disease
• Disproved the theory that bad air caused
  infection
• First disease he worked with was Anthrax
• Instrument(s) Used
• Microscope

10
Lynn Margulis

• Date of discovery
• Late 1960s-1970s
• Contribution
• Though that certain organelles found in
  eukaryotes were actually free-living prokaryotes
• Thought this mainly about mitochondria
  chloroplast because they have their own DNA and
  are shaped like bacteria
• Instrument(s) Used
• Microscope