Voyager space probes

The Voyager space probes were the first man-made objects to leave the Solar System. They gather data about outer space and carry information about humanity.

Related extras

Underground coal mining

As opposed to opencast mines, in underground mines the layers covering coal are not...

Air transport

Air transport has become the fastest, most reliable and most popular form of travel.

Rolling roads

The rolling highway (Rollende Landstrasse) is an environmental friendly way of transport where...

The European Union

Learn about the history and economic operation of the European Union.

Intercontinental urban traffic

Transport planning that involves two distinct parts of a major city is no mean feat. Especially...

Ferrous metallurgy (basic)

Raw iron is produced from iron ore in iron smelters.


Tourism is a significant sector of the economy that grows continuously all around the world.

The Channel Tunnel

The Channel Tunnel is a 50.5 km long railway tunnel between the United Kingdom and...

Added to your cart.