5. Ball Lightning
Ball lightning does not look like regular lightning. Instead it takes the form of a glowing sphere drifting horizontally through the air. It can vary in size from a minuscule pea to a large bus. No real theories have been formed and yet at least five percent of the total population has seen ball lightning in some point of time.
4. Aurora Borealis
Undoubtedly one of the most beautiful events to occur in our world, the Aurora Borealis, also known as the Northern Lights, has both astounded and amazed people since it was first discovered. It is much easier to stare at the phenomenon and enjoy its beauty than to understand why exactly it occurs.
3. Sprites
Sprites are large scale high-energy electrical discharges that occur above thunderstorm clouds. They are caused by the discharges of positive lightning between a thunderstorm and the ground and give rise to a large variety of bright and unusual visual shapes. Sprites have been reported since 1886 but only last for a few milliseconds and are very rare, so there are few photographs and videos of them.
2. Green Flashes
Sometimes, when the sun sets or rises, the top edge of that sun will appear to be a bright green, but one usually has to see it through a distant horizon. Atmospheric conditions have to be nearly perfect with no clouds all the way down to the horizon. It may last for around a second this phenomenon is called a green flash, and it is caused by a certain refraction of light in the atmosphere.
1. The Taos Hum
The Taos Hum is a low-frequency humming noise that occurs frequently in Taos, New Mexico. Similar hums like the Taos Hum have been reported all over the world and have been attributed to sounds caused by machines or other industrial-related things. The thing that makes the Taos Hum so special that it deserves a spot on this list is that no one has ever found the source of the hum, and what’s even more interesting is that the sound is often intensified and much louder in buildings but is only heard by around 2 percent of the population.
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