For example I don't think science will fully explain what happens when we die.
It kind of does, in as much as the scientific method can be applied. Your heart stops, your brain activity ceases, your organs fail, you start to decompose, and so on...
I'm talking about when people report seeing things and people etc when they are passing over before they get pulled back. Science has an explanation but it doesn't explain why some people are able to describe things that actually happened. See parts of the surgery or attempts to re start their hart. Things that were said and done despite the fact they were technically dead at that moment
Any attempt to prove that people having near-death experiences (I'm pretty accepting of NDEs BTW, the brain is a funny thing) can actually observe their environment has failed. There have been studies using planted items with specific visual imagery in operating theatres, and (as far as I can tell) not one patient has ever reported seeing the laptop on top of the cabinet with a purple picture of the Statue of Liberty displayed on it (or whatever).
In fact, when patients are questioned about NDEs with regard to perhaps striking things they may have observed, the frequency with which patients admit to standard NDEs (the light tunnel, time distortion, life review) drops dramatically.
And so you are left with personal testimony, personal testimony which seems to be sensitive to the environment under which it is obtained, and is never a reliable resource for scientific process.
Endorphind adrenaline or drugs may in some minds explain the whole tunnel of light thing but not the rest.
There is no "all the rest" apart from "what people say". It is not the job of science to explain "what people say" (although it may be able to address when/why they say it).