will there be more efficent ways to travel in space except space ships?

Question: will there be more efficent ways to travel in space except space ships?
- Keywords:
  space,
  travel
Asked by victor to Monique on 12 Nov 2015.
- Monique Henson answered on 12 Nov 2015:
  
  Possibly! I don’t know of any more efficient ways to travel yet, but so many incredible discoveries have been made that no one’s ever thought of. Who knows what we’ll find out next?

Question: will there be more efficent ways to travel in space except space ships?