Today called Dubrovnik, this Croatian city is known for its spectacular architecture and beautiful location.
The axolotl, also known as Mexican salamander, is an amphibian species that keeps its gills even in adulthood.
Organs that detect signals of the environment or of the body and transmit them to the brain as nerve impulses.
This animation helps you learn the basics of healthy eating.
The Northern white-breasted hedgehog rolls into a ball to protect itself.
Highly committed Japanese soldiers fought primarily at the Asian and Pacific theatres of the Second World War.
The masterpieces of ancient Greek potters are important archaeological artefacts.
A spacecraft on its path is in a constant state of free fall.
This animation demonstrates different types of soil.
The archaeopteryx shows characteristics of both birds and reptiles. It is probably the ancestor of birds.
Before the American Civil war the use of slaves on plantations was typical in the Southern states.
As opposed to opencast mines, in underground mines the layers covering coal are not removed, coal is extracted from mine shafts.
Industrial estates provide infrastructure and services for companies.
An extinct group of Cephalopoda, with solid external skeletons. They are excellent index fossils.
A mammal with features typical of reptiles: it lays eggs and has a cloaca.
A prehistoric flying reptile, similar to birds. However, there is no direct evolutionary link between the two.
Capacitors store electrical energy in the form of electric charge.
This animation demonstrates the structure and operation of digital cameras.
This animation demonstrates the structure and operation of different types of optical disc drives.
Quetzalcoatlus was one of the largest known flying animals of all time.