First, an explanation of Quantum Immortality and the
Quantum Immortality is...well, if the many-worlds
interpretation of quantum physics is correct, and you can
only observe things when you're alive, you'll never observe
your own death. You'll only observe yourself being
lucky, because you don't observe all of the other
(more likely) cases where you died. Look at yourself--
you're alive, against all odds, and have survived many
near-misses that could have killed you. Good job! This is
because if you did die, you wouldn't be here to see the
result, therefore you cannot die. This means you're free to
do really risky stuff, because fate/luck will always, always
seem to save you.
The Fermi Paradox is that there are uncountable billions of
planets capable of supporting life, but no intelligent aliens
as far as we can tell.
My Idea: use Quantum Immortality to solve the Fermi
Paradox. Every intelligent alien race discovered the
Quantum Immortality interpretation of quantum mechanics
at around the same time they discovered space travel.
Then, they proceeded to kill themselves off by doing fun
but dangerous things, because quantum immortality only
works for the observer.
Additionally, the most-probable existences to experience
are ones where you live forever naturally, without massive
and ongoing sequences of improbable events.
In short, you are the least-unlikely immortal
consciousness, and when you inevitably make it to the
stars you will find dead alien planets full of alien extreme
sports equipment and long-dead risk-loving aliens who are
all still alive in a parallel universe.
[it's not a let's-all because it's true. you cannot escape.
don't panic...that would be an unpleasant way to spend