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I do believe other species exist out in space, but it is highly unlikely, in my opinion, that any alien species out there can hop on to our planet, survive our gravitational pull or lack thereof, not wearing a space suit of any kind. I feel that when alien stories are passed around, there are pieces missing. Here are more things to consider before you believe everything you read:
1. Every planet has a different measurement of gravity that its creatures have evolved to become accustomed too. Therefore, wouldn't a small alien from a small planet have a hard time visiting earth and walking on our soil? A large alien from a dense planet would bounce around Earth like we do on the moon, would it not?
2. Why do we assume that all aliens breathe oxygen? Is oxygen a key component for life, or could aliens breathe other gasses? Isn't it odd that most alien stories don't include space suits?
3. Temperatures. Again, without a spacesuit, are we to assume that the only livable planets are exactly like Earth? What if Earth is too hot or too cold? And here people see aliens like grays running around with no protective gear.
4. Bacteria. Viruses. Parasites. They could bring them. They could get sick here. Again.... most legends don't mention a space suit. Is it possible that advanced civiliztions have studied Earth and have vaccinated themselves? I suppose that would be the only solution I can think of.
The above concerns are what bother me about Star Trek and other sci-fi series. Don't get me wrong, I LOOOOOOVE Star Trek, Star Wars, etc... but if you think too much about it like me, you realize it couldn't really happen exactly like that.
I personally do not believe that every planet has Earth-like conditions, so any alien species that visits here will need protection of some sort.
Now, observing safely from a space ship is a different story. Like on The Enterprise, gravity could be created and adjusted, the proper levels of "air" are maintained, etc...
Thoughts?
1. Every planet has a different measurement of gravity that its creatures have evolved to become accustomed too. Therefore, wouldn't a small alien from a small planet have a hard time visiting earth and walking on our soil? A large alien from a dense planet would bounce around Earth like we do on the moon, would it not?
2. Why do we assume that all aliens breathe oxygen? Is oxygen a key component for life, or could aliens breathe other gasses? Isn't it odd that most alien stories don't include space suits?
3. Temperatures. Again, without a spacesuit, are we to assume that the only livable planets are exactly like Earth? What if Earth is too hot or too cold? And here people see aliens like grays running around with no protective gear.
4. Bacteria. Viruses. Parasites. They could bring them. They could get sick here. Again.... most legends don't mention a space suit. Is it possible that advanced civiliztions have studied Earth and have vaccinated themselves? I suppose that would be the only solution I can think of.
The above concerns are what bother me about Star Trek and other sci-fi series. Don't get me wrong, I LOOOOOOVE Star Trek, Star Wars, etc... but if you think too much about it like me, you realize it couldn't really happen exactly like that.
I personally do not believe that every planet has Earth-like conditions, so any alien species that visits here will need protection of some sort.
Now, observing safely from a space ship is a different story. Like on The Enterprise, gravity could be created and adjusted, the proper levels of "air" are maintained, etc...
Thoughts?