Declassifying History - Did our technology really come from aliens?

I go back and forth on whether or not recently declassified technology is from Aliens or Human sources... and do some digging to track down those sources...

https://en.wikipedia.org/wiki/Metamaterial
http://www.alienscientist.com/fouche.html

http://hoverbrothers.com/theory/

https://en.wikipedia.org/wiki/Potential_cultural_impact_of_extraterrestrial_contact