overread: Science and religion have always gone more hand in hand than most atheists would want to believe (remembering that atheists believe in not believing in God ;)).
The latter part is not actually true. That is in fact a strawman. The truth is most if not all atheists simply do not believe God does not exist. Not having a belief is not itself a belief. It is by tautology the absence of a belief. There are many things that I as an atheist believe in and that is not one of them.
Many atheists reject the term atheist precisely because it does not in fact represent what they do believe in unlike theists which does invoke some sort belief. And saying what you don't believe in is not as good a descriptor as what you do believe in. Hence the term Humanist. Me? I don't really care what I'm called in that respect. Labels are labels and whatever someone wants to label you as and make it dirty, they will do regardless of what you put forward.
overread: This is mostly because of two key factors:
1) Most religions were based on the explanation and understanding of the heavens themselves - ergo your basic astrology.
2) In the past almost all the really well educated people were religious themselves (either part of religious orders/groups or in devout societies). Even during the birth of science in the Victorian era, many of the strongest scientists were also very religious people - something you can clearly see in their studies of the natural world which were hampered and tailored by their religion.
The fact that this pattern exists is not a new revelation in itself, nor is it an unexpected turn. It is however, something that can be abused if taken too far and is also highly susceptible to being twisted since our understanding of past times is sketchy at best and based of proxy and written records only. Large bodies of fact remain missing in many ages, whilst also we must remember that written details might reflect an understanding of a time, but will not tell the whole story of that age.
This is all very well and good also remembering that organized religion adheres to dogma far more than science and doesn't like when science appears to contradict the literal interpretation of that dogma.
That said many important scientists even in fields like evolutionary biology are still religious. So I agree with overall idea that there is no conflict between religion and science. Do you know why? Because science is the pinnacle of atheism.
Sound like a contradiction? Not at all. For when you simply carry no belief over the existence of a supernatural deity, or deities for those of you who are polytheists, then you make no assumptions based on it nor arguments against it. Belief are just model assumptions where the model invokes a supernatural (but I'll use the terms interchangeably). The supernatural, by definition, is something that exists outside of the natural realm and is thus untouchable by science. Science can never prove nor disprove it's existence. Science is thus also the ultimate agnostic. Therefore for someone who is religious science can always simply be the instrument by which one studies the universe whose rules and foundations were laid by whatever spiritual process they believe in. For an atheist the rules and foundations of the natural world are the philosophical limit. Faith of the supernatural requires assumptions that fall outside of the natural realm. Thus an atheist cannot have them just as science cannot have them.