Important people and their contributions to science!!

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Important people and their contributions to
science!!

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Rachel Carson 1907 - 1964

• Studied conservation and natural resources.
• Raised awareness of the dangers of pesticide
  use.
• Called for new policies to protect human health
  and the environment.

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Alfred Wegener1880 - 1930

• - Proposed that Earth's continents were once
  joined together and
• drifted apart over time.
• Found fossils of similar animals on different
  continents.
• - Came up with the Theory of Continental Drift

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Robert Hooke1635 - 1703
- Proposed the Cell Theory cells are the basic
structure of living organisms.
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Percival Lowell1855 - 1916
- Studied the solar system - Began the search
for Pluto
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Alexander Fleming1881 - 1955

• Discovered a way to stop bacterial infections.
• Penicillin

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Nicolaus Copernicus 1473 - 1543
- Suggested that the sun is at the center of the
universe.
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Edward Jenner1749 - 1823

• Developed a way to prevent illnesses.
• Smallpox vaccine

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Luis and Walter Alvarez1911 1988 1940 -
present
- Developed a theory that a giant asteroid struck
Earths surface and caused the extinction of
dinosaurs.