Famed screenwriter Charlie Kaufman and theoretical physicist Brian Greene dissect time as we know it. What is the smallest unit of time, and what does it look like? For starters, you should stop looking at the clock, and start looking at the universe.
http://www.nyas.org/Publications/Media/PodcastDetail.aspx?cid=f3f02313-c697-49da-b298-9b00f2e3d541
In science fiction it’s easy to hop into your spaceship and blast off for other stars. But the true distances between stars, and the limits of relativity make interstellar travel almost impossible with our current technology. What would it really take to travel from star to star, exploring the galaxy?
http://www.astronomycast.com/space-flight/ep-145-interstellar-travel/