Have you ever watched a science fiction movie and said "yeah, right!"? Of course you did.
Science fiction movies, trying to please the audience, got so many things wrong. Fantasy has no limits; logic does.
1. Sound In Space
Do you remember the poster from "Alien"? "In Space, no one can hear you scream". That is very true as sound needs air to travel in and, as we all know, there is no air in space. Sound is, in fact, vibrations in the air. Space is a vacuum, so every sound we hear in the movies is really science fiction. Spaceships should not go "whoosh" as they appear on the screen, explosions should not go "boom" when they occur and laser guns should not go "zzzz" when they shoot at ugly aliens. Not that entertaining, right?
2. Traveling Faster Than Light
The most common thing in science fiction movies is traveling faster than the speed of light. Just remember the scenes with the crew ready to buckle up so as to get in hyperspace dimension and be boosted in another galaxy. That sounds really great, but as Einstein claimed, the law is that nothing can be faster that the speed of light in a vacuum space.
And there is another catch too. In order to even reach the speed of light you must acquire massive amount of energy. Or, I should better say, infinite amount of energy. Since we still have not figure out a way to do that, and it still remains a distant theory, traveling in such speed is something impossible.
3. Time Travel
When I was young, "Back To The Future" was one of my favorite movies. I thought it is really cool to have a machine that I would get into, press some buttons and travel to any date I wanted. But, it's not going to happen. The reason is the same as the above. Traveling close to the speed of light, time relatively moves slower (you can travel billion miles in just a few seconds) but you cannot make time go back. If you want the clock to start ticking backwards, you must travel faster than light. And that is not viable.
Some might say that you can go back in time by these, so called, "wormholes". These tunnels could probably allow you to go back breaking the connection between space and time. But, once more, to make these tunnels open and close any time you want, requires extreme energy. So, stop dreaming.
4. Flying Cars
"Fifth Element", "Minority Report", "I Robot" are only some of the science fiction movies that project the use of flying cars. Some older movies with similar theme always began with "sometime in 2005". As you can see, we are in 2009 and we still have to suffer this irritating traffic jam. Hmmm…..do you think there would actually be "air traffic jam"?
5. Avoiding Laser Beams
Have you ever wondered what lasers are? They are light; simple light. First of all, laser should not be visible as a bullet that zaps from the gun and shoots the attacked one, but as a constant beam. Let alone, light's speed is 186.000 miles per second. So avoiding a laser beam is a childish idea. You wouldn't even have the time to think to duck because your brain would be already melted from the laser beam.
6. Colonization Of The Moon And Other Planets
A plethora of science fiction movies, especially of the 1960s, kept showing the great colonies we would have made so far but none of these happened. We still are not able to fly as visitors to the moon. We still have not find a way to save our planet, how can we find a way to live to another planet?
Another common subject of science fiction movies, such as "Star Trek", is teleportation; moving a person or an object from one place to another in seconds without traveling. Is it possible? The scientists claim that it is, but only in theory. The human body consists from billion molecules that have to disassemble and reassemble all over again to make it happen. In some experiments, scientists have managed to teleport only single nuclear spins, photons, and ions. But when it comes to living organisms, things are a bit more complex. Putting back the atoms without causing damage is something that will take hundreds of years to make it happen.
The "Fly" was a movie that was fundamentally wrong. Two different types of DNA's cannot merge into one. That is a law and not just a theory. If the teleportation was feasible, man and fly would just be teleported as they were before that.
8. Transforming Aliens
Almost all sci-fi movies keep showing aliens that transform into humans so as to make connection. That cannot be possible as the DNA's are totally different. You cannot take the form of any other living creature with different DNA even if you are a superior being. Apart that, we have seen cases where aliens take a human form and then change into something huge or tiny. Remember MBI were the last alien turned into a huge cockroach? Where was all that alien mass before? How can it be vanished and then come back again? Where did it go?
9. Human Always Inferior Than Alien
Why that has to work this way? Why shouldn't we be the ones with the superior civilization and the immense scientific discoveries? Skies are full of planets. Only the known galaxies have billions of planets that can be home for extra terrestrial beings. Maybe we are the ones with the advanced technology and intelligence. Think about it.
10. Radiation Effects
An extremely favourable subject for science fiction writers. Insects, animals, or even humans that were exposed to radiation turn into blood - thirsty creatures. The most common explanation for humans turning into zombies or weird shaped cannibals is this. Radiation would damage them but the effects would be visible generations after them.
Don't try to rationalize science fiction films. You will kill all the fun. Just sit back, relax and enjoy your favorite movie!