Mother Nature is full of surprises even after all these years of research and studies. These phenomenons here are some of the most spectacular ones that occur and some of them are not even properly understood.

No 10. Mammatus Clouds

Also known as mammatocumulus, they are a cellular pattern of pouches hanging underneath the base of a cloud. These are primarily composed of ice and can extend for hundreds of miles in each direction. They are sometimes visible for ten to fifteen minutes at a time.

[youtube]http://www.youtube.com/watch?v=18xEUTJHDdw[/youtube]

[youtube]http://www.youtube.com/watch?v=Mt0zXfEktuQ[/youtube]

No 9. Moon Bows

A moon bow is a type of ‘rainbow’ caused by the moon and is much much rarer. It occurs only at night when the moon is low and full to almost full. It appeara on opposite part of the sky from the moon. It is too faint for the human eye to make out its different colors. Moon bows have been seen on sites such as Cumberland Falls, near Corbin, Kentucky and Waimea on the Hawaiian Island of Kauai.

[youtube]http://www.youtube.com/watch?v=N6cEJHldmy0[/youtube]

No 8. Sailing Stones

Rocks in the desert of Death Valley, weighing up to hundreds of pounds have been known to move up to hundreds of yards at a time by themselves. Why these rocks move, what causes their movements is still a subject of great mystery. What’s more interesting is the fact that their path is also non-linear; some move in a straight line while some change their mind on the way.

Here is one possible explanation:

[youtube]http://www.youtube.com/watch?v=u1hoiHvOeGc[/youtube]

No 7. Fire Whirls

This is a rare phenomenon in which a fire, under certain conditions of air temperature and currents, acquires a vertical vorticity and forms a whirl extending 10 to 60 meters into the sky. Their duration depends upon the winds and these are usually formed during bush fires.

[youtube]http://www.youtube.com/watch?v=ssn2kmNf0ME[/youtube]