Self-Driving Vehicles

Four years from now, in the year 2020, I definitely think that technologies will advance. I predict that the most common used cars will be self-driving. There are already self-driving cars today but it is not the average car because of its high price. In the future, self-driving cars will be the norm. I believe the purpose of a self-driving cars is for human safety. Majority of the car crashes are probably because of a human error, but with the self-driving cars, there will be less chance for car accidents.
In the year 2020, I also predict that aliens will be closely discovered. New planets are discovered often, and scientists have already discovered thousands of earth like planets. I believe there is a good chance that aliens will be found