Definitely is something that lingers in the back of my mind when teaching at a Christian University. There was this reason from the 2011 Barna group poll:
Reason #3 – Churches come across as antagonistic to science.
One of the reasons young adults feel disconnected from church or from faith is the tension they feel between Christianity and science. The most common of the perceptions in this arena is “Christians are too confident they know all the answers” (35%). Three out of ten young adults with a Christian background feel that “churches are out of step with the scientific world we live in” (29%). Another one-quarter embrace the perception that “Christianity is anti-science” (25%). And nearly the same proportion (23%) said they have “been turned off by the creation-versus-evolution debate.” Furthermore, the research shows that many science-minded young Christians are struggling to find ways of staying faithful to their beliefs and to their professional calling in science-related industries.
I’m not sure about any more recent up-to-date descriptions, there are 10 reasons here discussed from a Lifeway poll but I don’t have access: The Top Reasons Young People Drop Out of Church...... | News & Reporting | Christianity Today.