The first documented citing of UFOs may have been in 1561 over Nuremberg, Germany where blood red balls seemed to battle with gigantic red crosses. Since then the crafts that aliens fly in have been debated for centuries. The most popular craft is the saucer, which is like a flattened cylinder. The details on the saucer vary widely from having balls on the bottom to a raised area where the control room is. The saucer can also have antenna or tons of windows.
Other crafts would be ones that look like fat jets with no wings. Crafts where the front is flat and has three wings. Crafts that look like a blob with a hole in the front similar to a manta rays mouth, still more have a wing that goes along the top with a stabilizer wing on the bottom. UFOs may also look like a cigar and others in this shape have "legs" making them look like centipedes.
People have said that they have seen and even claimed to have been abducted by these crafts. The claims however are hard to believe do to the fact that many of the people don't have any scars, cuts or marks where they say they were examined. Also no two people describe the craft or aliens the same, if multiple people say they saw it. There are those who do have strange marks on them or other evidence when they claim to have been abducted which makes everyone wonder.