Stephen Hawking
If aliens visit us, the outcome would be much as when Columbus landed in America, which didn't turn out well for the Native Americans.
More quotes and aphorisms
I think 80 percent of the population are really great...I am not a passive person, but I chose to fall...Nothing great was ever achieved without enthusiasm...Creativity is putting your imagination to work...You can live to be a hundred...Teenagers talk about the idea of having each other...