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Bridges have been in use for quite some time. Some of the earliest surviving bridges are from around the second Century BC. Generally, they were stone arches, a form that dominated bridge construction until wrought iron and steel were used in the early 18th Century and, 150 years later, concrete. Two Renaissance stone bridges can still be seen in Paris – the Pont Notre Dame (1305) and the Pont Neuf (1606). Early bridges were mostly stone and built by the church but now must are built by government and made of concrete.

Read more on Polyurethane Products for Concrete Bridge Repair…

Try to see if you recognize these 13 inventor names before you read what they invented.

One of the most well known inventors of modern history is Thomas Edison, whose name is linked to more than 1,000 different patents. However there are many not so well known inventors out there whose inventions we know and use almost every day. Some may say even take for granted. To this day no one knows the exact origins of arguably the most important invention in all of human civilization, the wheel, but we all know what it is and use it almost on a daily basis.

Read more on Stuff 101 – Not So Well Know Inventors And Their Inventions…