Singularity was our Big Bang with the universe being infinite..when you die your energy passes into another dimension of the 11 we have mathematically identified.
These are my theories.
Discuss.
Chaos Theory, we are but the result of near infinite possibilities afforded by the vastness of spacetime. Order and design are created through choatic chance and the interconnectedness of nature and mathamatics/laws of physics. Our plain of existence and dimensions we know is but a plain or "projection" that our minds and bodies are able to comprehend. What happens after who knows, another dimension is a good a guess as any.
What makes you think life doesnt exist outside of Earth? Astronomers estimate there are 11 billion earth sized planets orbiting habitable zones of Sun like stars...the odds are pretty good that we are not alone in this galaxy. Though it would be pretty special if Earth was the only planet out of 11 billion to support life.
Other life absolutely exists/existed/will exist through the vastness of the universe and time. Whether we will ever be so fortunate to cross paths will depend on whether we can get our sorry species to stop fucking around here and evolve. I mean, I wouldn't be surprised to find microbes within the solar system one day, but outside of that, slim chances.