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Charles Darwin and Alfred Wallace were both involved in the development of the theory of evolution by natural selection.

How were they involved?

1 ) 

Darwin first suggested the theory and Wallace developed it a hundred years later.

2 ) 

They both travelled together on a ship called the Beagle.

3 ) 

They worked together writing a book called ‘On the Origin of Species’.

4 ) 

They wrote scientific papers separately but then presented them together.

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