Saturday, 26 July 2014
A bridge is a
structure built to span physical obstacles such as a body of water, valley, or road,
for the purpose of providing passage over the obstacle. The first bridges were
made by nature itself, as simple as a log fallen across a stream or stones in
the river. The first bridges made by humans were probably spans of cut wooden
logs or planks and eventually stones, using a simple support and crossbeam
arrangement. Source
