Apparently you don't keep up with science very well. There are plenty of theories on how to move faster than light, and time travel.
Plus there are parasites (which the facehugger/alien was) that control the brains of their prey, or use another creature for baby food. For example there is a species of wasp that lays its eggs inside of a species of spider, which is eaten alive by the wasp larvae.
Also I don't think it's ever stated that the "ray guns" of sci-fi movies are necessarily lasers.

Ha HA looks like justin777 put all the debate to rest. Sorry but After reading through this it looks true to me.
Russians were not known for being particularly(PUN) safe back then(ever?). And plenty of people have pointed out there are different types of particle accelerators.
Those who call fake so quick are worse than people that use wiki and other sources to confirm stories, because you seem to think that just reading a few articles on a subject gives you authoritative knowledge.