-
1600
the first bridges seemed to be made by nature, such a logs fallen across streams, the first bridges made by humans were made of wooden logs and the eventually stones -
1700
Brides were starting to form a structure -
1800
Humans started using all types of metals -
1900
Humans started to build more complex bridges and it grow easier and faster to build them -
2000
brides became longer and even faster to build and they were all around the world