The evidence that things are changing fast can be seen in the dramatic increase in the influence of blogging. We should be collecting emails as we used to collect telephone numbers and using them to better communicate our message to key voters.
Evidence pointing to eagle hunting's antiquity comes from Scythian and other burial mounds of nomads who roamed the steppes 3,000 years ago and whose artifacts abound in eagle imagery.
Science has a culture that is inherently cautious and that is normally not a bad thing. You could even say conservative, because of the peer review process and because the scientific method prizes uncertainty and penalises anyone who goes out on any sort of a limb that is not held in place by abundant and well-documented evidence.
On television and in the movies, crimes are always solved. Nothing is left uncertain. By the end, the viewer knows whodunit. In real life, on the other hand, many murders remain unsolved, and even some that are 'solved' to the satisfaction of the police and prosecutors lack sufficient evidence to result in a conviction.
Juries are not computers. They are composed of human beings who evaluate evidence differently.
The prosecution wants to make sure the process by which the evidence was obtained is not truthfully presented, because, as often as not, that process will raise questions.
It's not a coincidence that the Bible starts with Genesis. Most people really want to know where we came from and where everything around us came from. I like to strongly push the scientific answer. We have evidence. We no longer have to rely on stories we were told when we were young.