Scientist Richard Dawkins has apologised for "letting slip the dogs of Twitterwar" after he implied it would be "immoral" to carry on with a pregnancy if the mother knew the foetus had Down's syndrome.
Professor Dawkins became embroiled in a row on the social networking site after he responded to a user who said they would face a "real ethical dilemma" if they became pregnant with a Down's syndrome child.
Prof Dawkins later defended his view, posting:
He has since provided a fuller explanation on his website, entitled Abortion and Down Syndrome: An Apology for Letting Slip the Dogs of Twitterwar, claiming his comments were "misunderstood."
The professor also said that he had hoped that his million-plus Twitter followers would not see his comments, thinking it instead it would only be sent out to those who follow both the woman who made the initial comment and himself.