Experiments have taken place aboard the International Space Station to study cement based concrete in microgravity. ISS Science: http://www.nasa.gov/iss-science NASA Science: http://science.nasa.gov/ Click here to see more videos: https://alugha.com/NASA
Quick and short explanation of the saponification reaction, first in general and then with a concrete example. Only the hydrolysis of a fat molecule is discussed and no mechanism is explained. Original: "Wolfgang Dukorn" Original: German. All translations in this video have been done by the alugha
The Nebra sky disk is the world's oldest known concrete representation of astronomical phenomena and is more than 3600 years old. It shows a crescent moon, the full moon - sometimes interpreted as the sun - and a total of 32 stars. Author: ZDF/Terra X/SPIEGEL TV/Christopher Gerisch/Tilman Remme/Rei
