Living organisms

[Objectivist]

living organisms have always existed. Single-celled organisms came to Earth in a meteorite from another planet. Time goes without beginning and end
do you agree

I don't agree.  We don't know that life exists anywhere but here on Earth and the Earth has not always existed.  I suppose it's possible that organisms came here on a meteorite but that doesn't mean life has always existed.  I read about them finding algae on the outside of the ISS and germs can be frozen and live so I suppose there is enough evidence to say that it's possible but that's all we can say.  As far as time going without a beginning or ending, I think existence goes without a beginning or ending and time is something that exists, but I think that time is very much local and can vary.  From what I've read, in a black hole, time may be at a standstill.  Supposedly if you fell into a black hole you could watch the entire future of the universe from your perspective inside the hole.  I think Einstein demonstrated that time is relative to the observer and to velocity.  I think that photons travel at the speed of light and so time for them is at a standstill.  

I think life came about by plain old natural causality here on Earth and that since it was a causal process it wasn't random or chance. It seems to me like the whole life coming here on asteroids is an extra unneeded step.   I hope that there are other life forms out there but I don't have any evidence of it.  I think that time is fascinating and we still have a lot to learn about it.