Lightning is a sudden electrostatic discharge accompanied by a sound known as thunder.
A periodic climate pattern that occurs across the tropical Pacific Ocean every five years.
Tropical rainforests play an important role in regulating the Earth climate.
Seawater, as an external force, plays an important role in shaping coastlines.
An introduction of the climatic and altitudinal zones of the African continent.
Wind, as an external force, plays an important role in shaping coastal areas and steppes.
We can observe quite interesting astronomical phenomena when the Earth, the Sun and the Moon align.
The last Ice Age ended about 13 thousand years ago.