When did time begin? Did we invent math or did we discover it?

Where does a thought go when it's forgotten?

Do we have free will or is everything predestined?

Is there life after death?

Is it really possible to experience anything objectively?

What are dreams?

What is the goal of humanity?

For when did time begin, it didn’t really begin? It just kinda happened and we don’t know when it sorta started because we haven’t reached that far into it to know exactly what happened.

We invented math to help us explain certain things like science and many other things.

It doesn’t go anywhere, it stays there but your thoughts just go off to other thoughts so eventually you forget that previous though. It’ll stay in the back of your memory so that is why we randomly remember things that we’ve thought of before.

Technically, we have free will but because the world we live in we need to have structure and laws in place so we don’t kill each other and everything is even.

We do not know if there is life after death but, people do have their own opinions and beliefs on if there is a life beyond death. The reason why we don’t know if there’s a life after death because you can’t come back from death. Most of the time when people come back to life, during certain situations, you cannot hundred percent believe what they say.

Dreams are an iffy topic because we don’t really know too much where they come from. Though, usually dreams happen when you were put into REM stage of sleep, during this time your brain has very high activity that resembles the same waves as when you’re awake.

Technically, there is no goal to humanity because all of the goals we think we have are just thoughts and personal goals. The only goal as a species we have though is to repopulate like any other species on this planet.
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I hope that some of this helps, sorry if some of the spelling is bad because English is not my first language.