The Secret Community Associated with UFOs and the Order of the Dolphin

The speaker discovered a community of people associated with the topic of UFOs, whom he initially called 'the invisibles'. These people seemed invisible to almost everyone and were carrying out secret activities. The speaker encountered the children and grandchildren of these individuals, realizing that their existence is not acknowledged and is quite unusual. Additionally, the speaker found it intriguing to learn about the Order of the Dolphin, a small group of scientists from the 1960s and 70s who attempted to make contact with non-human intelligent life.