The circumference of the Earth has already been calculated in ancient Egypt. The calculations...
The atmosphere surrounds us everywhere on this planet. We take its presence so much for granted...
The Earth’s magnetic North and South poles are located near the geographic North and South poles.
One third of the continents is covered with desert. Today, desertification is a growing problem.
The dissolution of limestone results in the development of karst formations.
A geyser is a spring characterised by intermittent discharge of water and steam.
The destructive force of waves can create steep cliffs in certain coastal areas. Let’s see how...
Physical properties, as well as the flora and fauna of the ocean change with depth.