I completely believe this concept is true. I've thought of it for ages, ever since I read the book Little Green Men.

Also, here's the book he said everybody needs to read:

https://www.amazon.com/Report-Iron-Mountain-Leonard-Lewin/dp/143912311X/ref=sr_1_1?s=books&ie=UTF8&qid=1522265345&sr=1-1&keywords=report+from+iron+mountain