They are here.

In this TED Talk John Hodgman tries to show, by telling a series of events that happened to him, extraterrestrial life does exist. He wants to inform that scientists have found life outer space, but they want to keep it as a secret so that people do not get alarmed. It is funny how he relates the encounters, he believes, he had with aliens. Even though he tells these encounters with certain humour, he wants to transmit a message to the audience. That message is clearly put on the table several times; he wants to expose extraterrestial life to everyone. He truly believes that every single person should know that life outer spaces has been always present. He is constantly emphasizing the fact that these visitors from other planets, have been among us, watching our evolution throuighout the time. It is always good having someone who wants to inform and transmit us knowledge about extraterrestial life, like John, keeping it always consice and believable.