A website with a database of information on a variety of units of measure. Look for new perspectives on the magnitude of any physical quantity. Contribute your own unique "Perspective Block." Or do it the easy way -- ask the Units Guy how big or small. Explore & learn!
The Yangtze River is Asia’s longest river. It is the world’s third longest river after the Nile and Amazon. It’s 3,956-mile (6,380 kilometer) length starts in the Plateau of Tibet, the world’s highest plateau and stretches to the South China Sea.