The problem is, one can observe evolution (in your own lifetime) by watching organisms with shorter lifespans. So we know it's real. But we can't watch it in longer lifespan organisms, we just don't live long enough ourselves. But we can deduce it occurs at the macro level (why wouldn't it, really?) by carefully studying fossils, in sequence. The story of evolution is like a filthy movie reel someone pulled out of the muck. First time you play it, only a frame or two is clear--you don't know the story yet. Time goes on, more frames (snapshots) get cleaned up (observation), and you start to get glimpses of movement, you can start to see a bit of story emerge. Clean up enough frames and run the film and bingo! you understand the gist of the movie, even if you get some bad smudging here and there. As to the coelacanth, evolution doesn't require all designs to change, if one keeps working, it keeps working, particularly if its environment doesn't change enough (to warrant adaptation or extinction). If it's any comfort, science will never be able to say what was First Cause (not so long as we believe in cause and effect)--there's your spot for God. That's where I've got Him. : )
Nessie is not a fact. Man-made global warming is a fact. Evolution is a fact. That all life on earth evolved from very simple bacteria-like organisms is a fact. Science does not know if there was a first cause. That's a fact.
You're 3 for 5. Nessie and man made global warming are in the eye's of the beholder, and those that believe in one can't be critical of those that believe in the other. Contributing to global warming and "making" global warming are two entirely different things.