The Chinese kept silk production a secret because it was very important to their culture and economy for thousands of years.
Answer:
Edgar Allan Poe was an American writer, poet, critic and editor best known for evocative short stories and poems that captured the imagination and interest of readers around the world.
As the nebular cloud condenses and its own gravitational attraction collapses it, heat and energy build up creating "nuclear fusion".
Nuclear fusion, process by which nuclear reactions between light components form heavier components. In situations where the interfacing cores have a place with components with low nuclear numbers (e.g., hydrogen or its isotopes deuterium and tritium), considerable measures of energy are discharged.
