Studied medicine at Studied medicine at Edinburgh University Edinburgh University

(1825-1827)(1825-1827)

Studied medicine at Studied medicine at Edinburgh University Edinburgh University

(1825-1827)(1825-1827)

Studied to become a Studied to become a minister at Cambridge minister at Cambridge

(1827-1831)(1827-1831)

Studied to become a Studied to become a minister at Cambridge minister at Cambridge

(1827-1831)(1827-1831)

Born in Shrewsbury, Born in Shrewsbury, England, in 1809England, in 1809

Born in Shrewsbury, Born in Shrewsbury, England, in 1809England, in 1809

After Cambridge, After Cambridge, Charles sailed aboard Charles sailed aboard the HMS Beagle as a the HMS Beagle as a

naturalistnaturalist

After Cambridge, After Cambridge, Charles sailed aboard Charles sailed aboard the HMS Beagle as a the HMS Beagle as a

naturalistnaturalist

1831-18361831-1836

The The BeagleBeagle sailed around the world. sailed around the world. The The BeagleBeagle sailed around the world. sailed around the world.

Most people-including Most people-including scientists believed each scientists believed each

species was a divine species was a divine creation.creation.

Most people-including Most people-including scientists believed each scientists believed each

species was a divine species was a divine creation.creation.

Darwin was also Darwin was also influenced by a influenced by a

number of scientists:number of scientists:

Darwin was also Darwin was also influenced by a influenced by a

number of scientists:number of scientists:

Lamarck: organisms change over Lamarck: organisms change over generationsgenerations

Lyell: surface of the Earth changed Lyell: surface of the Earth changed slowly over many slowly over many yearsyears

Malthus: observations about human Malthus: observations about human populations growthpopulations growth

Lamarck: organisms change over Lamarck: organisms change over generationsgenerations

Lyell: surface of the Earth changed Lyell: surface of the Earth changed slowly over many slowly over many yearsyears

Malthus: observations about human Malthus: observations about human populations growthpopulations growth

On the voyage, On the voyage, Darwin noticed Darwin noticed that animals & that animals & plants differed plants differed

vastly vastly

On the voyage, On the voyage, Darwin noticed Darwin noticed that animals & that animals & plants differed plants differed

vastly vastly

Patterns in the species Patterns in the species suggested that the suggested that the

species had changed species had changed over time and had given over time and had given rise to new & different rise to new & different

species.species.

Patterns in the species Patterns in the species suggested that the suggested that the

species had changed species had changed over time and had given over time and had given rise to new & different rise to new & different

species.species.

The Galapagos The Galapagos Islands lie 500 miles Islands lie 500 miles west of Ecuador in west of Ecuador in the Pacific Ocean, the Pacific Ocean,

directly on the directly on the equator.equator.

The Galapagos The Galapagos Islands lie 500 miles Islands lie 500 miles west of Ecuador in west of Ecuador in the Pacific Ocean, the Pacific Ocean,

directly on the directly on the equator.equator.

Many of Darwin’s Many of Darwin’s conclusions were conclusions were

based on based on observations of observations of

wildlife in the wildlife in the Galapagos Islands.Galapagos Islands.

Many of Darwin’s Many of Darwin’s conclusions were conclusions were

based on based on observations of observations of

wildlife in the wildlife in the Galapagos Islands.Galapagos Islands.

“Galapagos” means turtle.

What it must have been like to be Darwin…

Noticed there were Noticed there were several types of several types of

finches.finches.

Noticed there were Noticed there were several types of several types of

finches.finches.

Finches looked Finches looked like a bird he like a bird he

had seen on the had seen on the South American South American

continent.continent.

Finches looked Finches looked like a bird he like a bird he

had seen on the had seen on the South American South American

continent.continent.

The birds must have The birds must have migrated from South migrated from South

America to the America to the Galapagos & changed Galapagos & changed

over the years.over the years.

The birds must have The birds must have migrated from South migrated from South

America to the America to the Galapagos & changed Galapagos & changed

over the years.over the years.

Explanation for the numerous species of Explanation for the numerous species of birds present.birds present.

Explanation for the numerous species of Explanation for the numerous species of birds present.birds present.

woodpecker finch

cactus finch

large ground finch

Darwin called this…Darwin called this…Darwin called this…Darwin called this…

orororor

(genetic change in a population over time)(genetic change in a population over time)(genetic change in a population over time)(genetic change in a population over time)

Darwin concluded:Darwin concluded:

Each species has descended, with changes, Each species has descended, with changes, from other species over time.from other species over time.

Darwin concluded:Darwin concluded:

Each species has descended, with changes, Each species has descended, with changes, from other species over time.from other species over time.

Descent With ModificationsDescent With ModificationsDescent With ModificationsDescent With Modifications

Darwin combined the Darwin combined the observations & evidence observations & evidence

gathered on his voyage to form gathered on his voyage to form

Darwin combined the Darwin combined the observations & evidence observations & evidence

gathered on his voyage to form gathered on his voyage to form

……or Survival of the Fittest.or Survival of the Fittest.……or Survival of the Fittest.or Survival of the Fittest.