"By 1955, original saucer witness Kenneth Arnold began to promote the theory, suggesting that the UFOs are "sort of like sky jellyfish." Arnold added: "My theory might sound funny, but just remember that there are a lot of things in nature that we don’t know yet." " In 1962, he argued "the so-called unidentified flying objects that have been seen in our atmosphere are not spaceships from another planet at all, but are groups and masses of living organisms that are as much a part of our atmosphere and space as the life we find in the oceans."