10.) Asperatus CloudsCredit: http://commons.wikimedia.org/wiki/User:Agathman
Asperatus clouds aren't an official cloud type, but are closely related to Undulatus clouds. Asperatus clouds are extremely rare and occur when air masses collide and force up the bottom cloud layers, forming wavy and "silky" formations. They mainly occur in central United States, and more commonly in the plains states after thunderstorms.
9.) Double Rainbow
A rainbow is essentially a spectrum of light that appears in the sky when the sun illuminates moisture that is in Earth's atmosphere. A double rainbow occurs when the sunlight reflects twice within the moisture droplets, creating the appearance of two rainbows.
8.) Nacreaous CloudsCredit: http://www.flickr.com/photos/alan_light/5273213702/
Nacreaous clouds are your distant, bright and wavy cloud formations that appear in the colder regions and higher latitude countries, such as Iceland and northern Canada. Nacreaous clouds appear at extremely high altitudes, usually between 15,000 to 25,000 meters, and are often mistaken for UFOs. Although Nacreaous clouds are an interesting natural phenomena, they are also very destructive. The clouds create a chemical reaction which slowly destroys the ozone layer.
7.) FoxfireCredit: Cas Liber
Foxfire is a strange light created by certain fungi, most often rotting bark. The green glow is causedby an oxidizing agent, but the full purpose of the glow is unknown. Foxfire is usually dim, but can be seen in some forests at night.
6.) Red TidesCredit: http://www.flickr.com/photos/8819274@N04/2670193377
Red tides are probably one of the most eerie looking strangest natural phenomenon in the world. A red tide occurs when algae forms together in highly concentrated groups. Red tides may look bright and fun but in actuality they produce dangerous toxins that kill marine life. These tides have occurred in almost every US coastal state.
5.) Columnar BasaltsCredit: http://commons.wikimedia.org/wiki/File:Columnar_basalt_closeup_near_Tower_Fall_in_Yellowstone.JPG
Columnar basalts are rock formations that are created by the quick cooling of lava flows. They often appear man-made in columns resembling a hexagon shape.
4.)Aurora BorealisCredit: http://www.flickr.com/photos/11304375@N07/2249104485
The Aurora Borealis, also known as the Northern/Southern lights are created when charged electrons react with elements in the earth's atmosphere. The exact color of the aurora depends on what atom has a reaction and at what altitude this reaction occurs. Aurora Borealis usually occurs near the magnetic poles around the Arctic and Antarctic circles.
3.) Moeraki Boulders
The Moeraki boulders are large spherical stones located in New Zealand on Koekohe beach. Millions of years of erosion on mudstone and bedrock have naturally formed the unusual boulders.
2.) Raining AnimalsCredit: http://www.flickr.com/photos/renwest/438340463/
There have been many confirmed cases of "flightless" animals falling from the sky. Some experts say that strong winds have picked up the animals and carried them over several miles, but this has never been scientifically confirmed. Frogs, worms, fish, and jellyfish have all been reported raining from the sky.
1.) The Taos HumCredit: http://www.flickr.com/photos/85563234@N00/77272895/
The Taos hum is a low-frequency sound named after the town Taos, New Mexico, where its commonly heard. It's unknown where the sound is originating from or what is causing the annoying hum. The hum has been heard in many other parts of the world, just not as frequently as in Taos.