One lucky sperm has made it into the egg – now the chromosomes from the sperm and the egg can start to link up.

In Part I of this episode, which deals with human birth, we start with the Big Bang and follow a troop of sperm as they make their way to the ovum.

In this final segment detailing the goings-on within a human cell, we learn about what happens when there’s a skin injury.

A few nasty viruses have managed to gain entry into the cells. But the white blood cells can handle them!

The journey continues inside of the cell, where one of the operators take a few elements along on a tour of all of the different respiratory processes.

Red and white blood cells, fats, carbohydrates, and more! They are all anthropomorphized in this zany animated look at how human cells are formed.

What is a cell made of, and how many of them are there in the human body? And what is the “primordial soup” from which all life on Earth emerged?

This series (originally created in French) explains processes in the human body, and in particular those related to cells and reproduction. We begin with the origin of the first cell—the source of all life on Earth!

Although Archimedes always wanted only to improve mankind, he has to use his intelligence to build war machines for the Greeks in his old age. The Romans want to hire him to work for them, but that is not to be …

The dying king asks Archimedes to work as an inventor of war machines, because the Romans want to attack the city of Syracuse. Will he be able to help come up with new ideas to help the army?

How will Archimedes be able to prove that the crown is not made of pure gold? Seeing his talent, the King asks him to help create systems for work that needs to be done.

The king suspects that his goldsmith has cheated him and his new crown isn’t really made of pure gold. Can Archimedes help determine what the crown is made of without smashing it apart?

In this video, you will learn what a gnomon was used for, who Euclid and Eratosthenes were, and what secret Archimedes thinks he discovered after his apprenticeship with Euclid.

In Part 2, you'll get to know more gemstones and learn about their origin and uses, as well as the properties that are attributed to some of them.

Ancient Greece was home to many great thinkers, such as the physician Hippocrates, the philosopher Socrates, the sculptor Phidias, and the mathematician Archimedes.