A demonstration of nearby planets, stars and galaxies.
In benzene there are sigma bonds and delocalised pi bonds between carbon atoms.
We can travel on dual carriageways on the motorway.
Energy released during nuclear fission can be used for civilian or military purposes.
While generators convert mechanical energy into electrical energy, electric motors convert electrical energy into mechanical energy.
These Palaeolithic statuettes probably symbolise fertility and prosperity.
This animation introduces the studies of astronomers and physicists whose works fundamentally changed our view of the universe.
The French Montgolfier brothers were the first pioneers of flying.
This animation demonstrates Sir Isaac Newton's three laws of motion that laid the foundation for classical mechanics.
The magnificent bath complex of the Roman Emperor was built in the 3rd century AD.
The steam engine, perfected by the Scottish engineer James Watt, revolutionised technology.
The animation shows the traditional Japanese wooden townhouse, the machiya.
The Panama Canal is an artificial waterway created to shorten shipping routes between the Pacific Ocean and the Atlantic Ocean.
Learning about the geographic location, capitals and flags of the world´s countries through exercises in three levels of difficulty.
The central nervous system consists of the brain and the spinal cord, the peripheral nervous system consists of nerves and ganglia.
At the end of the 18th century, mining boomed because of the great need for raw materials in the dynamically developing industry.
Lunar eclipses occur when the Moon passes through the shadow cone of Earth
Vertical forces can break up layers of rock into fault blocks, which then move vertically along the fracture planes.
Carved into a granite cliff, the sculptures of the Mount Rushmore National Memorial depict four great United States presidents.
One of the most modern means of transport is the Maglev, capable of travelling at speeds of over 400 km/h.