Subject: preventing the heat death of the universe?

i have seen many sites saying that a heat death of the universe is inevitable no
matter what

After learning about the second law of thermodynamics it seems that humanity has
an unfortunate limit placed on its powers to survive. If at least some heat is
created from each chemical reaction, how can we convert that heat energy back
into other forms so that we may continue our existence in the universe. I cannot
die comfortably knowing that all remnants of our civilization will be eliminated
come a few billion years. And if there is some way that I may still be present
when the universe nears its eventual heat death due to entropy, I would like it
for humanity to remain existant with its resiliency and ability to reason. I
have seen some sites about a "Carnot" heat engine but do not understand the
principles behind it, could you give me a definition of how it works and how it
could be used to prevent heat death (my peers say it has the potential to)?

i have hope that humanity can remove aging and obtain resources from new/other
planets and find another star to provide energy, but the heat death of the
universe is something so final that i do not want it to happen

are there ways currently existing or that are being developed which can convert
heat energy back to other forms of energy, thus allowing human life to be
sustained and prosper for possibly eternity?

also, i have read a previous post (http://www.madsci.org/posts/archives/
may2001/991317003.Ph.r.html) that talked about the potential for lasers as
an energy source when used on a hydrogen tablet (that post stated that the
energy output created by the lasers had not surpassed the energy input) could be
used as a new source of nuclear fusion... however, does that still remain within
the confines of the second law of thermodynamics and if so are we just doomed to
a gradually colder existence?

Re: preventing the heat death of the universe?