added by lilyZ
The sun keeps the planets in its orbit with a tremendous magnetic force. What would happen if it disappeared entirely? Learn about the 星, 星级 at the center of our solar system, and how it is critical to all life as we know it.
added by dkayb91
Did Zambia make it to the moon? This is the little-known tale of how Zambia competed against the mighty forces of Russia and the USA to be the first to land on the moon.