Interstellar Travel - Possibilities and Human Physiology

I am interested in the potential for Human Interstellar Travel. Questions that need answers are (but not limited to):1. Is interstellar travel even possible?
2. How quickly could we get to a near star?
3. What technologies would be either theoretically possible or other (lunatic fringe)?
4. Presuming we go, what life forms would it be required to tag along?
5. What physiological/genetic changes should we consider for H. sapiens space travel?My current thinking is that we go to the nearest star and build a space station there, if there is no planet/moon that could be colonized, and then use that as a jumping off point for further hopping. If we could go at 0.5c it would take about 10 years. Colonizing Mars could act as a technological and physiological experiment station.BTW, I am not a big SciFi fan, but I do think we will eventually colonize the galaxy, without FTL travel.This is just a first draft of such a thread and there will be a lot of biology involved and technical pieces.

Thread copied to the Interstellar Travel - Possibilities and Human Physiology thread in the Coffee House forum, this copy of the thread has been closed.