In the recent few years there were a lot of changes in the field of medicine. New technologies are applied to aid the diseased all around the globe. However, the way from first design to the introduced product or device is long.
Mining is tough physical work. Mine workers must be physically strong and have the proper mental attitude to do their work effectively.
Mine employees are people who risk their lives at work.
More and more people wonder what is the best method of making their house well insulated. In history we did it with rocks straw or even straw.