Light, which travels at ~186,000 miles/second is the fastest known natural phenomenon.
Light
This phenomenon is way outside our known natural laws.
The cause of the mysterious phenomenon known as "sky trumpets" is not definitively known, but possible explanations include natural atmospheric or geological sources, such as shifting ice or gas escaping from the Earth's crust.
A rainbow appears after the rain as a beautiful natural phenomenon.
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Aurora
The grand canyon is considered to be a natural phenomenon
this is a natural phenomenon
Typhon explains the natural phenomenon of hurricanes or tropical cyclones, which are characterized by strong winds, heavy rainfall, and storm surges. Typhon is a monster in Greek mythology known for his destructive power, which is analogous to the destructive force of hurricanes.
You can define the words natural phenomenon as an even that is not man-made. This includes rain, fog, tornadoes, and the sunset.
The natural phenomenon that allows for the growths on trees to occur is called photosynthesis.
The Grand Canyon is considered to be a natural phenomenon.