Mysteries : not realveled till now

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What Happened To Frederick Valentich?
Frederick Valentich was 20 years old in October 1978, when he flew a Cessna 182L light aircraft towards King Island, Australia. As he flew over the Bass Strait, he stayed in touch with Melbourne Air Traffic Control until their communication was cut by a strange noise.
During the radio transmission, Valentich made frequent mention of “a strange aircraft hovering on top of me.” He tells the controller, “It is hovering and it is not an aircraft,” and describes the object further by saying, “Delta Sierra Juliet – Melbourne. It seems like it’s (stationary) or (chasing me). What I’m doing right now is orbiting, and the thing is just orbiting on top of me also … It’s got a green light, and sort of metallic (like). It’s all shiny (on) the outside.”
Over on the shoreline, plumber Ray Manifold had set up a time lapse camera in a bid to catch the sun dropping over the horizon. When the photos were developed, an object travelling at speed was seen to come out of the water, and witnesses interviewed by the Scientific Journal of Exploration reported an “erratically moving green light” in the sky at the same time Valentich was in the air.
Frederick Valentich’s conversation with Melbourne ATC was the last anyone ever heard of him. He and his aircraft simply vanished into thin air, prompting Adelaide researcher Keith Basterfield to state after 34 years of investigation “”The only thing we can say for sure is that the plane and pilot disappeared while he was describing a UFO – which is one of those things that just makes people wonder.”
Overtoun Bridge
The beautiful Overtoun Bridge in Dumbarton, Scotland has a grisly history. Built in 1859, the bridge has become known as “The Dog Suicide Bridge,” referring to up to 600 dogs that have leapt from its parapet in the last 50 years. The dogs all jumped in the same direction from the same point of the bridge, plunging 50 feet to the rocks below. Dogs that have survived the drop have been known to repeat their dive again, resulting in the second fall killing them.
Theories abound as to what is causing the dogs to leap from the bridge, with supernatural forces, depression transmitted from owner to pet, dogs willingly and intentionally committing suicide, and a scent from under the bridge drawing them to their deaths being the main reasons discussed.
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Raining Blood in India
During the 2001 monsoon season, residents of Kerala in southern India were bewildered by a blood red rain that fell between July 25 and September 23. Loud thunder was followed by trees shedding leaves with a shrivelled and burnt appearance, and deluges of crimson water stained the land and the clothes of locals.
Scientists concluded that algae spores were responsible for the unusual colouring and the matter was closed until 2006, when the rain returned. A 2008 theory from two Mahatma Gandhi University researchers hypothesized that “The mysterious red colour in the rain is caused by unidentified life form that does not have DNA….The molecular composition of these cells is yet to be identified.” The rain caused further concern on its most recent visit in 2012.