A spectacular optical illusion using a chain of closed rings.
Examination of long, rectangular onion epidermal cells under the microscope at 100x magnification.
We will measure the height of this large cathedral with a set square and some mathematics.
It likes oak forests. It is easily recognisable by its chestnut coat with cream-coloured mottling.
In this experiment we prove that the volume of the prism is three times the volume of the square pyramid.
A plant native to the temperate regions of Europe and Asia that lives mostly in oak forests.
Bauxite is a raw material in aluminium production. Watch this video to learn how the well-known silver-tone metal is produced from the red rock.
Naturally well-suited for development of all kinds of tourism, Montenegro is focused on becoming an elite tourist destination.
The main characteristic of the rhinoceros is the horn at the front of its skull, which it uses to attack as well as to protect itself.
A forest tree species characteristic of floodplains. It survives long periods of time in saturated or completely flooded ground.
People with a higher social position tend to separate themselves from the lower social classes. Establishing closed housing estates called gated communities is one of the easiest ways to do this.
The weather can be forecast with different meteorological instruments.
A video about a pink wading bird with an arcuate bill. Its peculiarity is that it sleeps standing on one leg.
In archaeology, excavation is the exposure, processing and recording of archaeological finds.
A plant species widespread in Europe and North America. It is rather invasive in places where it was introduced, such as the US.
Unlike us humans, instead of using their eyesight, dogs mainly use their excellent sense of smell to recognise objects, people and animals.
Dogs are teachable and obedient companions. They can therefore be trained for various purposes.
Dogs are quite teachable animals; therefore, their so-called operant conditioning can easily be examined with an everyday object.
This video explains why the Barbary sheep on the savannahs bear such a strong resemblance to goats.
Pelicans are highly protected birds. They can be easily recognised by their pouched bill.
Montenegro is situated on the western part of the Balkan Peninsula. Its population barely exceeds 600 thousand. It declared independence from Serbia in 2006.
A backwater is a part of a river in which there is little or no current. Backwaters also provide opportunities for leisure activities such as canoeing and fishing.