1. Darwin’s Voyage
Chapter 16

2. Evolution A change over time

3. Developed a scientific theory that explains how modern organisms evolved over long periods of time through descent from common ancestors.
Charles Darwin

4. Darwin’s Voyage
1831: Darwin sailed around the world in the HMS Beagle making observations and collecting evidence.
Most of his work was done at the Galapagos Islands, located 100 km west of South America.
1859: Darwin publishes Origin of the Species.

5. Darwin’s Observations
Different, yet similar, animal species inhabited separated, but similar, habitats around the globe.
Different, yet related, animal species occupied different habitats within a local area.
Some fossils of extinct animals were similar to living species.

6. Ideas that Shaped Darwin

7. Scientists that Influenced Darwin
James Hutton: Using geology he concluded that the earth must be much older than a few thousand years.

8. Scientists that Influenced Darwin
Thomas Malthus: Reasoned that if the human population grew unchecked, their wouldn’t be enough space and food for everyone.

9. Scientists that Influenced Darwin
• Charles Lyell: Argued for uniformitarianism - the geological processes we see today must be the same ones that occurred long ago.

10. Jean Baptiste Lamark
1809 –Suggested that organisms could change during their lifetimes by using or not using parts of their bodies. These acquired traits could then be passed onto their offspring.