The Song dynasty was the second great "medieval" period of China. Northern Song (while it lasted) and the Southern Song (from 1127 until 1279) achieved incredible feats of learning, science, art, and philosophy. International trade and...

See if the King, Queen, or one of their loyal subjects can figure out how to solve the problem of their crummy bridge. This animated video from Math Snacks focuses on using what you know about converting measurements and reading a line...

Constructed in 1898, this is an example of late 19th-century commercial architecture. It served as the focal point of transportation into Montgomery. The train shed is significant in that it shows the adaptation of bridge-building...