If a dog is starving it will chase an empty food bowl around and never get fed.
A human will go to the shop and get some food.
This suggests to me that humans have an intellectual edge over a dog. All be it a small edge if you happen to win an election.
The quest to discover the meaning of life is a human trait, I dare say a man made trait.
There are and indeed have been billions of species on planet earth and we are the only one with the ability to do many things to any real degree. A chimp can use tools, but it will not be opening a tool store any time soon. Squirrels store food for the winter months, but they do not buy bonds. Cats can catch a mouse but they have not realised that a bit of cheese and a spring (mouse trap) will do it for you and likely never will.
We are unique as a species, well we are on this planet anyway. 1 in billions and billions.
Abraham lineage religions suggest the cloud dweller (God, Allah, Jehovah) made all things great and small for our benefit.
Darwinian thoughts suggest a random series of events gradually formed the basics and intracity eventually followed. Just add heat, water, minerals and billions of years.
Either God spoke to some old guy on top of a hill or the old guy made it up.
Maybe Darwin thought his hypothesis to be rational, but of course he made it up.
Darwin never saw primordial soup, but suspected it was.
I think the search for the meaning of life is a fine demonstration of our ability to create, wonder, invent and be who or whatever we want to be. I think it likely we want to know because we do not yet. The unknown is a threat to life in general.
Probably another invention of humanity. I also think it likely if there is other life in our universe they too have creation myths, stories of olde and similar unanswered questions.
Christian, Jew, Muslim or whatever think they have the answer and seem to live this life as a means to getting to the next one. Blind faith.
Atheists seem to decide life is for living and have heir own unique purpose.
Both however are given the same question and the answer can only work for them.
What I conclude from this is that the meaning if life is whatever you determine it to be.
It is yours and yours alone. Maybe we all only get one, maybe we are all destined for life after life after life? But alas this life is yours, may be the only one you get and only you can decide what best to do with it.
I spend much of my time and effort trying to make my own impact on the planet. I think we all do in our own way. Hitler went for a legacy, as did Elvis. Both of the same species. Amazing contrast.
My answer to the question, Q. What is the meaning of life?
A. Positive
To elaborate...
If I think it is positive, good, beneficial, interesting, exciting, worth my time then I think it gives meaning to my life.
If the question is ever to be answered with any surety we have other even more outlandish questions that need to be answered.
Where did the universe come from?
sub questions;
What is the universe made of? Creator? God? Always here? What happens when you die? Soul?
Example;
What is the meaning of life for a lab rat?
It was created of sorts, bred in a lab, it has a purpose and it will probably have a lasting effect on the direction of humanity...
This poses yet more questions though. The lab technician is not a god, nor a creator? or are they, is this a matter of scale?
We have little true understanding of the very big or the very small and it is rather romantic to think that we are somehow significant.
Imagine we find the answer;
We are just walking, talking bags of food, a delicacy for some alien super race. Bit like cows, but sweeter meat.
Then what?
We can still be romantic about it all I suppose, after all we are tastier than cows.