VATICAN CITY (Reuters) - Pope Benedict said on Thursday that embryonic stem cell research, artificial insemination and the prospect of human cloning had "shattered" human dignity.

In an address to members of the Vatican department on doctrinal matters, Benedict said the Church had a duty to defend the "great values at stake" in the field of bioethics.

The speech was the latest in a series in which the conservative Pope has told his listeners that scientific progress should not be accepted uncritically.

Benedict, who headed the same department for years before his election in 2005, said the Church was not against scientific progress but wanted it based on "ethical-moral principles".....

It was the Pope's latest foray into scientific issues. On Monday he warned against the "seductive" powers of science, saying it was important that science did not become the sole criteria for goodness