Your cart is emptyShop
A geyser is a spring characterised by intermittent discharge of water and steam.
The Incas´ rudimentary weapons were inadequate in their struggle against the Spanish Conquistadors.
System that satisfies consumers’ demands of water supply, wastewater disposal, electricity, heat and gas supply and telecommunication.
The migration of large human populations began in Ancient times.
The diameter of our galaxy is about 100,000 light years; it contains more than 100 billion stars, one of which is our Sun.
The water supply system provides clean and safe drinking water for the consumers.
This animation demonstrates the main sources of air pollution: agriculture, industry and urban settlements.
Igloos were the typical dwellings built by Eskimos living in the Arctic zone.
The pericarp of real fruits develops from the carpel, while the pericarp of pseudofruits develops from other parts of flowers.
The Emperor of the vast Far-Eastern empire was the lord of life and death.
The ‘upright man’ used tools and could set fire.
Observatories are often built at high elevations to minimise the effects of atmospheric turbulence
Careful tooth brushing is an important part of oral hygiene.
The anatomy of annelids is demonstrated through the example of the common earthworm.
Synovial joints can be categorised by the direction of movement they allow.
Cyclones are large areas of circulating air with clouds and precipitation being formed in its centre.
Cold and warm fronts are formed where bodies of cold and warm air meet.
Groundwater and aquifers are types of underground waters.
A periodic climate pattern that occurs across the tropical Pacific Ocean every five years.
The Crow are Native Americans who inhabited the Yellowstone River valley.