The
questions you have asked are very broad and philosophical in nature.
There are many different beliefs and theories about where we come from,
what our purpose is, and what happens when we die. These beliefs vary
across cultures, religions, and individuals.
From a scientific
perspective, when we die our body goes through a series of physical
changes. For example, as dying progresses the heart beats less strongly,
blood pressure falls, skin cools down and nails become dusky. Internal
organs function less as blood pressure drops. There may be periods of
restlessness or moments of confusion, or just gradually deepening
unconsciousness.
Some religious beliefs hold that after death our
spirit separates from our body and goes to the spirit world. However,
this is just one belief among many.
Your request for a research
on quantum physics, cosmic theory, string theory, theory of relativity,
life and death covers a wide range of topics. Here is some information
that might help you get started:
String theory is a theory in
particle physics that attempts to merge quantum mechanics with Albert
Einstein’s general theory of relativity. The name string theory comes
from the modeling of subatomic particles as tiny one-dimensional
“stringlike” entities rather than the more conventional approach in
which they are modeled as zero-dimensional point particles.
Quantum
mechanics studies the smallest objects in the universe—like atoms and
subatomic particles—while general relativity typically focuses on
larger-scale objects in the universe. String theory is an attempt to
unite these two pillars of 20th century physics with an overarching
framework that can explain all of physical reality.
