"Science" is a method of evaluating information and forming models for explaining everything from simple matters, like why the sky is blue, to more complex issues; the most complicated and controversial issue seems to revolve around how we got here.
Guess what? Nobody knows how we got here, and new evidence will continue to be found, scrutinized, rejected, reevaluated, laughed at, ignored, accepted, lauded, ect. We may never really know how, or why we are here. Is there any "plan" regarding humans? Who knows? Maybe we really are all alone, a fluke of Nature's random events?
Did we evolve from a common ancestor? That's what the experts say the evidence points to. I can't argue against it. That being said, I Would encourage your son to reason it out for himself. Just impress upon him the need to be objective, and to never stop learning.
I would encourage him not to worship anything, not even Science. Being a worshipper of "Science" to the exclusion of all else, in my opinion, is just as self-limiting as worshipping a Bronze Age deity.
The best advice that I can give as a parent is this:
1) Think about where your parents failed you, ( Yeah, they did. All parents fail their children in some way. Why? You can't teach what you weren't taught. ) and be determined to give your child what you did not receive. Now that you know, you have a responsibility to teach.
2) Never try to live vicariously through your child. LOVE, LOVE, LOVE, your child unconditionally! How many of us truly felt that kind of love growing up? I never did, and I don't know if I ever will. The feeling of insecurity caused by being constantly judged, espescially against ancient characters in a book, cannot be quantified.
However we got here is not as important as what we do while we are here. Worrying about proteins and DNA, arguing about "GOD", all those things pale in comparison to LOVE and LIFE.
How many science/religious debates will really matter if you look back, decades from now, and realize that you wasted precious time, time you cannot recover?
Your child won't remember all the conversations about DNA or all the theoretical discussions about a "common ancestor." They will remember that they had an awesome, judgment free, unconditionally love-filled day with you, and that you always supported them, and made them feel loved and secure.
In the end, isn't that what we all want? Some people never find that, but you have the opportunity to provide that for your child. To me, that's more important than anything else.
DD ( Mic-drop.....🎤.......😘 )