According to a poll from the Pew Research Center For The People and The Press/Smithsonian Magazine, the next 40 years are looking bright to most Americans.  By 2050, 71% believe that cancer will be cured, 66% say artificial limbs will work better than real ones, and 81% believe computers will be able to have conversations like humans.

The results were compiled from telephone and online interviews with 1,546 adults in April. The margin of error is plus or minus 3 percentage points, according to Pew.  Here are some other findings of the poll:

• 68% of those under 30 predict a world war by 2050.

• 53% say ordinary people will travel in space

• 72% believe the world is likely to experience a major worldwide energy crisis by 2050.

• 42% say it is likely that scientists will be able to tell what people are thinking by scanning their brains but 55% say this will definitely or probably not happen.

• 89% believe a woman will be elected US president by 2050.

• 41% say Jesus Christ will return within the next 40 years while 46% say this will definitely or probably not happen.

• 31% expect the planet will be struck by an asteroid.