Gabriele Betti wrote:
> I'd like to know why , if antimatter "exist" and since it react with matter
> releasing light or energy..why it doesn't exist an antimatter engine(like
> UFO to understand).
Since there are no readily available supplies of anti-matter anywhere in our area of the universe, we have to make our own via high energy particle beam collisions. Such a means of creating anti-matter consumes far more energy than we could extract from a matter / anti-matter engine. To generate enough anti-matter for one interstellar trip, it would take the entire electrical output of the worlds electric grid for several years.