it is very difficult to predict what major scientific breakthroughs are coming our way.
if I had to bet it safe, I would say that we might not witness it ourselves.
maybe our children will.
Do you think humanity will ever create colonies on the other planets (not just couple of trained astronauts but a civilian population in a city or something similar) and depending on your opinion why not / where and when do you think they're likely to be created first?... also will the frontier of colonising be in our own solar system on Mars for example or on some exoplanet