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.

Do you love gemstones and minerals? Then check out this video, where Eylin gives you fascinating info about all kinds of semi-precious stones.

The cold weather and a shortage of food eventually drove the Neanderthals to extinction, clearing the stage for Cro-Magnons, our direct ancestors. But you'll have to wait for the next episode to find out more about that!

The climate is getting colder, the animals are disappearing, and the Neanderthals are gradually running out of food. Times are tough, and the Neanderthals are being forced to do whatever they can to survive.

The Neaderthals discover that fire makes meat taste better than ever! As time goes on, they also refine their hunting techniques and even work out how to lay rather sophisticated traps.

The banished hunter finds a mate and is accepted into his new family as an equal. But there is someone who does not like that at all...

The Neanderthals discover that tools can be made from stones, new hunting methods are discovered, and the many different clans try to resolve disputes through negotiation.

Life is hard for Homo erectus, whose biggest challenge is to find enough food. At some point, one thing becomes very clear: It's better to hunt as a team!

Now the apes are slowly climbing down from the trees and starting to walk upright. What are the names of the next species and what characterizes them? Join us and witness this stage of our journey through the history of mankind.

Whether you are learning to drive stick shift or enjoy doing so, it's a good idea to understand the clutch. How does it work and how can you prevent stalling?

The dinosaurs die out and the Earth is populated with small mammals and apes, who slowly adapt to their surroundings over millions of years.

This video on the history of life on Earth looks at the emergence of reptiles and amphibians on land, and the different types of dinosaurs that roamed the land before continental drift occurred.