How long aliens have been visiting Earth.

• Cenozoic, paleolithic, ancient, post-atomic

• Greys aka Zeta Reticulans
• Orion, Sirius, Pleiades
• reptilians/Draconians: blood-drinking, shape-shifting reptilian humanoids from the Alpha Draconis star system, now hiding in underground bases, are the force behind a worldwide conspiracy against humanity. Most of the world's ancient and modern leaders are related to these reptilians, including the Merovingian dynasty, the Rothschilds, the Bush family and the British Royal family.
• Anunnaki: advanced humanoids from the undiscovered planet Nibiru, who came to Earth 500kya to mine gold
• insectoids: preying mantis
• nordics
• hybrids
• octopusses, dolphins
• mythological beings: Sasquatch, angels, nephilim, Goliath, Enkidu, Chimera, Kraken, Hydra, Minotaur, Medusa
• more here and here

One shockingly hominid body plan covers nearly all aliens.

• endoskeletal, tetrapodal, bipedal, pentadactyl, megacephalic, binocular, binaural, bi-nostril, asexual (but rape-y, probe-y), hairless, mute

• galactic federation
• conflicts

• alliance, commerce, control
• conflict
  • 1980s Strategic Defense Initiative was a successful conflict with aliens

• Egyptians, Sumerians, Greece, China, Japan, Tibet, Maya, Aztecs, Incas, Anasazi, Hopi, Vikings, Nazi Germany, United States

• K/T (dinosaur) extinction, Great Flood, Tower of Babel, Plague of Athens, Plague of Justinian, Black Death, U.S. Civil War, Spanish Flu

• Face on Mars; Göbekli Tepe in Turkey; Stonehenge; pyramids and sphinx in Egypt; Temple Mount and Dome of the Rock; Mecca; Chichen Itza; Sacsayhuamán and Ollantaytambo in Peru; pyramids of Teotihuacan in Mexico; Puma Punku in Bolivia; the Carnac stones of France; Zorats Karer in Armenia; Nazca lines; Easter Island

• Spacecraft: 9 working craft at Area 51, some acquired at archaeological digs
• Time portal: Looking Glass
• Time machine: Die Glocke
• Alien bodies

• evolution (e.g. dinosaur extinction), Neanderthals, Denisovans, Homo floresiensis.
• hybridization, genetic engineering, blood groups, breeding, abduction, impersonation, eating, enslaving, animal mutilation

Most of the following human groups know about aliens. Many are even controlled by aliens. These groups have secret levels of control over human affairs. Some of these “humans” are in fact aliens or alien hybrids.

• The Cabal, Majestic-12, Illuminati, Trilateral Commission, Bilderberg Group, Bohemian Grove, Freemasons, U.S. government, U.S. military, Federal Reserve, Council on Foreign Relations, European Union, United Nations, World Bank, International Monetary Fund, royal families, Catholic Church leaders, Elders of Zion, major defense contractors, major media companies. leading scientists, Hollywood elites

• Moses, Socrates, Leonardo da Vinci, Joan of Arc, Washington, Jefferson, Lincoln, Nikola Tesla, Grigori Rasputin, Albert Einstein, Srinivasa Ramanujan, Steve Jobs
• Rh-negative hybrids: most European royalty, most modern U.S. presidents

• Inter-dimensional travel, FTL travel, teleportation, time travel, anti-gravity, zero-point energy, momentum non-conservation, thermodynamics violations, shape-shifting, transmutation, telekinesis, mind control, telepathy, genetic engineering, underground bases, crop circles, (only ancient!) mega-structures and artifacts, Bermuda Triangle, Moon/Mars space stations. cf. Greer

• Allowing: eyewitnesses, imagery, leaks, whistleblowers, crashes, lost gear, shoot-downs, alien deaths, alien autopsies
• Needing: gold, ancient landing pads

• gold, slaves, observation, quarantine, altruism