And Imams never do anything terrible? I think you are revealing some bias.
Moreover, anybody who's live in the middle east knows that pedophilia is just as common in the muslim world as in the christian west.
They just change the rules to make it look acceptable. In Afghanistan, our troops have had to rescue numerous boys from taliban, government officials, tribal elders, etc. who often keep them as 'companions'. It's so common in fact, that we now have standard procedures for dealing with complaints about young lads being kidnapped. Combine that with the forced marriages of young girls in their early teens, and the truth about pedophilia is murkier than many would suggest.
That's not to take way anything from the abuse of boys by priests. But it's ridiculous to suggest that the Catholic church has exclusivity on having pedophiles in the ranks of its clergy.
As to the issue at hand, AoD hit the nail on the head. The Catholic Church's support for science in the post-reformation era stands well above that of any other faith group. And their scientific institutions are actually respected by scientists. The Vatican Observatory is considered a fairly decent physics institute. Historians and archaeologists with the Vatican archives are considered some of the best in their field.
The greatest contribution, however, has been the Church's stance that pure science is a form of revelation of the 'truth'. It is from this point of view that the church has challenged creationists. The CC has earned the ire of other Christian groups and denominations for rejecting creationism, intelligent design, etc. and for stating flat out that this is not the 'truth' and should not be taught in schools, etc. I would suggest, that for all its failures in history about relations between the scientific community and the Church, the stance taken today by the Church is extremely helpful to most scientist. Imagine the consequences for science if the Church started railing against the Darwinian evolution or the Big Bang Theory.
Even where they have issues with stuff like stem cell research, their opposition comes from bioethical standpoints. They are not opposed to the research as a science. They are opposed to its implications and consequences. That's not a far cry from many secular bioethicists who have voiced simliar concerns about this stuff. While I personally would disagree with their stance on the issue, we have to recognize that's a far cry from most Christian groups (and increasingly many Islamic groups - who also don't believe in evolution by the way) that are aghast at a lot of basic biological research wholesale.