Decoding UFOs: What do we know about ‘flying saucers’?

Unidentified flying objects (UFOs) or unique airborne objects fascinate the world. Till now, several sightings of UFOs have been made. Some call it the proof of existence of extraterrestrial life, while say it's some natural phenomena. “Flying saucers”, which UFOs are usually referred to as, have inspired many Hollywood flicks. But the real question is, what do we know about UFOs? Let’s explore the answer.