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2684
Radios, radars and mobile phones are based on Heinrich Hertz's work.
In this lesson, you can learn about herbaceous plants and perform experiments.
A lesson about the structure and characteristics of vascular plant tissues.
A lesson about the structure, role, significance and protection of human epithelium.
Pascal achieved significant results in mathematics, physics, philosophy, theology and literature.
A lesson about the structure, types, role and protection of connective tissues.
Learn about homogeneous, heterogeneous and colloidal systems.
In this lesson, you will learn about the formation and classification of carbohydrates.
A lesson about the properties of hydroxy compounds, oxo compounds, carboxylic acids, ethers and esters.
A lesson about environmental issues affecting Australia.
Uncertainty played a role not only in Heisenberg's discoveries in quantum physics, but also in his life.
Learn about the scientist who created a link between mechanics and thermodynamics.
The digestive system is responsible for separating the nutrients and unusable materials in the food we eat.
Learn about the life and works of the Bulgarian poet and national hero.
Learn about the middle and final sections of the digestive system.
Learn about Simeon I the Great, a legendary figure in Bulgarian history.
In this battle, Simeon I won a great victory over the Byzantine army.
In this lesson you can learn about the vision of humans and animals as well as the perception of colours.
Learn about the epic written by Homer, the Ancient Greek poet.
Hydrogen is the simplest and most common chemical element in the Universe.
Learn about the life and works of the renowned Bulgarian poet and novelist who is often called the 'Patriarch of Bulgarian literature'.
In this lesson, you will learn about the life of a significant Bulgarian writer.