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#### Development of the carnation flower

The carnation is considered as the national flower of Spain. Let's see how the flower develops.

#### Plotting parallel lines – Solution II

Let’s construct a rhombus such that one of its sides lies on line e and point P is one of the vertices on the opposite side.

#### Reflecting a line segment across an axis

Axis t and line segment AB are given on a plane. Let’s plot the mirror image of line segment AB across t.

#### Archimedes’ principle with gases

Is there a difference between the weight of a plastic bottle filled with air and the weight of a crushed one?

#### Constructing the perpendicular bisector of a line segment

Let’s construct the perpendicular bisector of a 6-cm-long line segment.

#### Plotting an angle bisector

In this video, we plot the angle bisector of a given alpha angle.

#### The focus of a jar

Studying the focal point of a jar filled with water.

#### How to copy an angle

Let’s copy a given alpha convex angle onto ray f with starting point F.

#### Writing in Ancient Egypt

Ancient Egypt, one of the largest civilisation in world history, had existed for more than three thousand years. These three thousand years were accompanied...

#### Dog tricks

Man's most loyal friend is the dog. They are excellent at guarding houses and can also be taught to perform minor tricks for us, too.

#### Hydrogen balloon explosion

In this experiment, we study the properties of hydrogen gas.

#### Extraction of crude oil

Let's take a look at the process of extraction of crude oil at a typical oil production plant.

#### Growing daffodil

The daffodil is a beautiful flower of alpine pastures and meadows. Let's see how the plant develops.

#### Extraction of natural gas

Did you know that the natural gas you use for heating may have been under the ground just two hours before?

Sergey Brin and Larry Page founded a company that has mesmerised the world with its innovative ideas.

#### Tulip growing

Let's watch how a tulip, widely considered to be the national flower of the Netherlands, develops from its bulb.

#### Romanesque architecture

It is an early architectural style characterised by thick walls and narrow windows.

#### Plotting a 45° angle

By bisecting a straight angle (180°), we get a right angle (90°). We get a 45° angle by bisecting that again.

#### Animals of the polar regions

A video about the mammals living in the cold climate zones of the Earth, like the polar bear, seals and penguins.

#### The story of the Internet

A network that was originally designed for military and academic purposes has quickly conquered the world.