Astronauts’ spelunkers returning from a training mission

An international team of astronauts who took part in a training mission, organized by the European Space Agency, has returned home after spending six days in the caves under the ground. Journey to the surface from their underground camp took the mission about five hours.

CAVES mission astronauts gave the opportunity to feel what it means to work as a cohesive and effective team during long space flights. In particular, they were able to hone their leadership and teamwork skills, working in a multinational team, which is typical for the International Space Station.

1000 years of war in five minutes

YouTube user made a five-minute film, which are all the wars that have taken position around the world in 1000. Chronological order the conflicts around the world since 1000 and until 2008.

War and global conflicts are, unfortunately, the key milestones in our lives, and this is evidenced by Jordi Colomer, user YouTube.

The distance from Earth to the Sun, finally identified

How far the Earth is from the Sun? This apparently simple question is actually a matter of dispute scientists for over a hundred years.

How to solve a specific point on the Earth to measure? How to determine what distance from the Sun to calculate - up of vapor or flames?