Milky Way

The diameter of our galaxy is about 100,000 light years; it contains more than 100 billion stars, one of which is our Sun.

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People have always preferred to settle near rivers. What are the advantages and disadvantages of...

The Pompeii before time

There is a little village in Northern Hungary in Central Europe that is a hiding place for a...


A geyser is a spring characterised by intermittent discharge of water and steam.

Atmospheric circulation

The difference between the temperature of the polar and equatorial zones causes atmospheric...

Weather fronts

When masses of cold and warm air meet, weather fronts develop.

The process of physical and chemical weathering

Upon physical weathering the rock only falls into pieces, whereas during chemical weathering its...

Deep Sea Hydrothermal Vents

A hydrothermal vent is a fissure in the planet's surface from which geothermally heated water...

The Jovian planets

The four outer planets (Jupiter, Saturn, Neptune and Uranus) do not have solid surfaces, thus...

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