The English engineer George Stephenson’s locomotive was built for a competition of locomotives in 1829.
One of the best known buildings in the world, this is the residence and office of the President of the United States.
Plants are capable of converting inorganic substances (carbon dioxide and water) into organic sugar.
Bats use ultrasound to navigate and hunt for prey.
Darwin's legendary voyage aboard HMS Beagle played a crucial role in the development of the Theory of Evolution.
This animation demonstrates the development of the ax throughout archeological periods.
The Rutherford Experiment proved the existence of positively charged atomic nuclei. The results led to the elaboration of a new atomic model.
The layers of different types of forests may vary.
This animation explains active and passive transport processes occurring through cell membranes
Bacteria are unicellular organisms that have no cell walls and are a few micrometers in length
Short-lived but extremely powerful tornadoes can cause a great deal of damage.
Amino acids are the monomers of proteins.
The Internet allows us to send data quickly to large distances.
Lightning is a sudden electrostatic discharge accompanied by a sound known as thunder.
Before the emergence of motorised vehicles, letters and packages were delivered by horse-drawn carriages.
River locks make rivers with great level differences safe for boating.
One of the directors of the circular, open-air Renaissance theater in London was William Shakespeare.
Icebergs are blocks of frozen freshwater floating in the sea.
This animation demonstrates the functioning of the 3 basic types of water tap.
Commercial maritime routes of container ships form a global network.