What is the Theory of Relativity?

In a compartment of the Moscow-Novosibirsk train, a young physicist meets famous film actors. The conversation accidentally comes to Einstein, and the woman begins to explain to her fellow travelers what the theory of relativity is. The actors are incidentally on their way to the shooting of a film about physicists, but they do not understand the subject at all.

Vacations in the Stone Age

A group of young scientists conducts an experiment, putting themselves in the conditions of the people of the Stone Age. With the help of stone tools, they procure food and fire, and make themselves comfortable in nature.