UFOs (undefined Flying Objects) are a true thing but Aliens and flying saucers may be a joke.
Imo UFOs are some natural phenomena still without scientific explanation like the globular lightning, in which some theories they are formed by factors such as static energy, terrestrial electromagnetism, microwave radiation, oxidizing aerosols, nuclear energy and even dark matter.
Especially during the cold war, the flying saucer rumor was created to divert attention from top secret military projects, and I guess this will continue to happen nowadays.
The most recent rumors about aliens, which I believe to be fake, are the three-fingered mummy found in Nazca-Perú by robbers in 2017 i.e. Mummy Maria:
Edited 4/29/2021 19:06:26