My ET contact JROD has given me a list of some of the ET technology in use on earth today. prsroger is correct in writing that earthlings are far too self destructive to live with it. First is the poly phase electrical system that is used world wide. According to JROD the Martians abducted Tesla and gave him the plans for it. Tesla also was given the basic circuits for radio transmission and computer logic direct from ET. He wanted to use radio to communicate with the Martians.
In the 1930s the Nazis had made contact with some blue, human ET that I call Anunnaki from Zecharia Sitchin's books. In 1937 in exchange for large amounts of gold they sold the plans for the atomic bomb to Hitler and Goering at an airfield outside Berlin. They also received night vision, rocket tech. magnetic tape. The Nazis paid for it in installments as they could not find enough gold. They had to loot Europe to get it. Much of the atomic plans leaked out to various scientist before the war began. They were employed by the Manhattan project, but they did not have everything the Nazis had. The Nazis had a more efficient method of uranium enrichment. And when they had paid enough gold they were given the mercury antimony detonator that allowed for a small bomb that would fit on a V2. They were just a little late in their payments to win the war.
The Americans shot down a flying disk over Los Angeles in 22 Feb. 1942. In this craft they found the fiber optic technology. They also back engineered metal detectors from it which they used to find and track enemy submarines, but are also now used to search for buried treasure.
After the war the Americans made contact with the Zeta. They provided all sorts of things: anti-gravity aircraft and space craft, the solid state circuits we use in all these cell phones and micro computers, equipment to neutralize and clean up atomic waste, a cure for radiation poisoning, and a free energy power source called power crystals.
All the Americans had to do was comply with conditions which included not weaponizing any of these things, and giving ET credit as the source. They failed to keep their part of the contract, so ET has as of January broken communications and recalled their ambassador from Washington. ET is very concerned about the power crystals, and they are trying to recover them. The Americans never used them for any good purpose, but they did weaponize them. They can be the ultimate dooms day device and actually explode the earth.
When you can go out and see the universe, who wants to go look at a Russian submarine? (Melvin C. Riley, US Army Remote Viewer)