In 1870, Darwin asked a friend to add a question to the English census about the status of Cousins marrying Cousins. His concern was that these pairings may be
negatively affecting their children through the effects of inbreeding. What
happens to the health of individuals who are the product of inbreeding and why
do they have these problems? *

As scientists have investigated evolution from a variety of fields, they have found that some of darwin's orginal ideas were inaccurate or incomplete. t explanation provided by evolution was updated each time to reflect the new information they found. what does this suggest about the theory of evolution? it has become a stronger and clearer theory as new information is collected.