Tornadoes are one of the most astonishing weather phenomena of our time. These whirlwinds can tear through an area and have diameters of up to 1000 metres. The Tornado exhibit explains the principle behind a tornado using steam. While real tornadoes mainly occur where hot and humid air meets dry, cold air masses, in this case steam is made to rotate using a clever arrangement of fans and air nozzles. But who comes up with these crazy ideas? The designer of this exhibit is an American called Ned Kahn, who is considered one of the best exhibit designers around. His exhibits often have funny stories attached to them. For example, the prototype of the Tornado was an electric frying pan filled with water and enclosed in a spiral-shaped Perspex wall.

Fine fog wafts around in a basin and flows over the edges. Clouds slowly rise into the air and form mysterious and mystical entities. Maybe you have already seen this natural phenomenon at work? Clouds are formed when moist air cools and the invisible water vapour condenses to form a fine mist of water droplets, as happens when you exhale outdoors on a cold winter's day. All clouds behave differently depending on the weather and wind conditions. As a result, they can spill over mountain ridges and flow downwards or artistically climb the side of a valley. In the sky too they can sometimes take on bizarre shapes, resembling sheep, trees or giants.