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Developed nearly 500 years ago, it is a variant of the Julian calendar. Today it is the most...
We can observe quite interesting astronomical phenomena when the Earth, the Sun and the Moon align.
The oxygen cycle describes the movement of oxygen within its three main reservoirs.
A hydrothermal vent is a fissure in the planet's surface from which geothermally heated...
We can often observe spectacular atmospheric phenomena. Let's see how some of these are formed.
It is characterised by dry, hot summers and mild winters.
On a geological time scale lakes are short-lived.
The surface of the Earth has been formed into its present state both by external and internal...