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If extraterrestrial life has actually visited here, they would have the ability to travel at the speed of light..
If some alien planet was 1000 lightyears away, it would take those travellers 1000 years to get here traveling at the speed of light. Which would also mean, they had the ability to travel at light speed 1000 years ago, which would also mean that, at present, they would have to be way way more advanced than we will ever think of being..
This makes the typical 'ufo' pictures hard to fathom because of their size.
Not to mention.. why would an alien form so advanced even want to bother swingin by ol' Mother Earth for a look-see...?
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