>>10840662Numerous encounters have been recorded and documented. All of these encounters share common trends among ship types, body types, etc. while it is not fully understood if these indicate that one alien civilization is visiting or multiple are, it does prove that they are among us.
The best evidence is the historic record. Humans have been making the same observations we make now for thousands and thousands of years. Except they likely had more contact since their governments were less able to suppress the contact. Aliens are most likely responsible for sites like the pyramids in Mexico for example.
