Two thoughts here. First, we really wish we could go back in time and have the job of making 1960s prop sci-fi guns. They’re so fun. No need to look practical at all. A beam of light added by the efx department and you’re good. We’d love to have this example on a shelf. Second, a good thing about this site is that it makes us seek out films beyond the obvious ones. Jane Fonda is best known for Barbarella, Klute, On Golden Pond, and maybe 9 to 5, but she was a staple in cinemas, and we’ve gotten to appreciate her choices and range over the years. Everything from Les félins to Coming Home to They Shoot Horses, Don’t They? to Youth were interesting at a minimum, and great often. Oh, and a third thing: Fonda was one of the hottest phenomena on Earth or in space around the time she made this photo in 1968. See more Barbarella shots here, here, here, and here. Why so many? Because the movie is like a costume design orgy, which makes every promo image worth seeing.
Can humanity make it to the 41st century? Maybe, if it looks like this.