IT’S easy to ride a mouse into cyberspace, but it is going to take a lot of
effort to put humans into interstellar space.
If you are curious about why it is taking so long to develop spacecraft that
can cross galaxies in an afternoon, NASA can help. It has just set up some Web
pages at http://www.lerc.nasa.gov/WWW/PAO/warp.htm called “Warp Drive When?”
Scientists from NASA’s Breakthrough Propulsion Physics programme explain the
problems and how to crack them.
