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Examination of the cells and stomas on the epidermis of a pelargonium at 100x magnification.
Let’s simulate protein digestion in the stomach using a mixture of hydrochloric acid and pepsin.
Observe what happens when making sounds with shorter and shorter pieces of the same straw.
A film about the green iguana, the popular inhabitant of exotic terrariums.
Every March, children love plaiting wreaths of dandelions. Let’s find out more about this popular meadow plant.
The structure, use and medicinal properties of trees living by water.
In the ancient Eastern religions it is the symbol of rebirth. Besides its aesthetically pleasing appearance, all of its parts are edible.
Native to South America, the plant is the basic ingredient in chocolate.
They are the best-known succulents and have adapted well to dry climate.
This plant in the family of Polygonaceae originates from Asia. Its name means “the root of Barbarians”. In many places it is grown as a vegetable, too.
The most widespread tree species in temperate forests. It grows slowly. Its timber is popular in the furniture industry.
After you have seen this video, you will be able to tell the English oak from the sessile oak.
We burn a heart in a piece of paper with the help of oxygen produced upon the decomposition of the potassium nitrate solution.
Thanks to its high nutritional value, the clover is an excellent fodder plant; four-leaved clovers are a real rarity and are thought to bring luck.
The Sun's rays travel through space without interruption, but once they reach the Earth's atmosphere, it can encounter multiple obstacles.
The circumference of the Earth has already been calculated in ancient Egypt. The calculations turned out to be rather accurate, considering the conditions of the time.
When the temperature of the cooling air reaches dew point condensation occurs because air is unable to hold more water.
Climate is the typical weather of a certain region that changes practically only on a geological scale, whereas weather can change day by day.
Rocks are a composed of minerals. These minerals can often be found in their pure forms.
In this experiment we produce carbon dioxide with vinegar and baking powder.
A gull species typically found on European beaches; it is easily recognisable by the distinctive sound it makes.
This owl species living in the furthest northern regions of our planet has adapted brilliantly to the harsh conditions of the taiga and the tundra.
This species is an excellent example for symbiosis. Living together with sea anemones they keep predators away.
A fearsome predator of snowy mountains. Of all the felids the snow leopard jumps the furthest.