For get what you learned in school, you wont find these lists in history books.
Ever since the first aircraft was built, man has been experimenting with different shapes and designs. Although we may think that we know of all the different types of aircraft that have been tried, there are still some experimental aircraft that we may not have heard of, let alone seen.
Natural disasters seem to be occurring more and more but not only that, they also seem to be wreaking more financial damage than they used to.
A hoax is something that is intentionally meant to fool people into believing something that has been made up to be true. During our history there have been many successful hoaxes and although many of them are intended to create the instigator wealth or fame, others seem to serve no purpose.
There have been reports of UFO Sightings for many years and from many sources but yet you, like many others, may still be skeptical. Who can blame you, after all, the thought of intelligent life elsewhere in the Galaxy is hard to get your head around when life is barely intelligent here.