36 Alien Races Live In The Milky Way, & Humans Are Composed Of 22 Different Alien Races, Says Famous Astronaut What if humanity is not just one species — but a cosmic blend of many? For decades, astronauts, scientists, whistleblowers, and insiders have hinted that Earth may be far more connected to the stars than we ever imagined. Some claim our DNA carries the fingerprints of 22 different alien races, while at least 36 advanced civilizations are believed to be active in the Milky Way right now.