Suggestions

• How popular was 'On the Origin of Species' when it was released?

• What did Asa Gray discuss with Darwin?

• What did Herbert Spencer base his ideas of human freedom and individual liberties on?

• What did John Gould announce about the Galapagos birds?

• What was Charles Darwin diagnosed with in 1882?

• What is the Creation-evolution controversy?

• What is the difference between savage and civilized man according to Charles Darwin?

• What did Darwin observe in Cape Town, South Africa that influenced his thinking on the replacement of extinct species?