We can reasonably infer that the first bridges were logs, thrown across narrow streams.
The first bridges are likely to have been fallen trees or logs placed across streams.
wooden bridges
Bridges over rivers were made in prehistoric times.
The first bridges were made by nature. It would usually be a fallen tree or log.
steel bridges are made out of steel OBVIOUSLY !!!
Ruby Bridges made a dent in history by being ONE of the first African Americans to go to an integrated schools.
They were great engineers. They were the ones who made the construction of the first suspension bridges.
suspension bridges
bridges are made to cross the rivers by train.
Ancient Roman bridges were made for the same reason we make bridges today---to cross a river or any other geographical feature more easily.Ancient Roman bridges were made for the same reason we make bridges today---to cross a river or any other geographical feature more easily.Ancient Roman bridges were made for the same reason we make bridges today---to cross a river or any other geographical feature more easily.Ancient Roman bridges were made for the same reason we make bridges today---to cross a river or any other geographical feature more easily.Ancient Roman bridges were made for the same reason we make bridges today---to cross a river or any other geographical feature more easily.Ancient Roman bridges were made for the same reason we make bridges today---to cross a river or any other geographical feature more easily.Ancient Roman bridges were made for the same reason we make bridges today---to cross a river or any other geographical feature more easily.Ancient Roman bridges were made for the same reason we make bridges today---to cross a river or any other geographical feature more easily.Ancient Roman bridges were made for the same reason we make bridges today---to cross a river or any other geographical feature more easily.
by hand
Ruby bridges was the first african american to enter an all white school