11.  No one knows for sure whether any creature could maintain even a spark of life while drifting through the killing environment of interstellar space for thousands of years.

12.  Other scientists have created amino acids in the laboratory before this, but never in conditions resembling interstellar space.

13.  Put differently, it shows that comets are heavenly vans carrying tons of carbon-rich materials from interstellar space to addresses throughout the solar system.

14.  Somehow, a team of scientists surmises, these complex molecules survived not only the hostile conditions of interstellar space but also a searing ride to earth.

15.  Somehow, the team of scientists surmises, these complex molecules survived not only the hostile conditions of interstellar space but also a searing ride to earth.

16.  The absolute, unvarying speed only applies when light is traveling through a vacuum, such as the vast reaches of interstellar space.

17.  We tend to think of interstellar space as utterly empty, and with good reason.

18.  When man finally climbs into the reaches of interstellar space, the issue of time will be more than an interesting astronomical tidbit.

19.  When they do reach true interstellar space, it is possible that one of the spacecraft may still be faintly signaling.