China now boasts seven of the 10 longest bridges in the world, all built within the past decade. Such engineering feats were once mainly the province of the United States, which for much of the latter half of the 20th century boasted most of the longest bridges in the world. Here are the 10 longest bridges in the U.S., and no matter how well traveled you are, four or five of these bridges will come as a surprise.
There are two types of neck braces: soft and rigid. A soft cervical collar is made from thick foam rubber covered in cotton. It is used to support your neck and control pain after an injury (e.g., whiplash).
There are many different types of braces that can be placed on the teeth by an Orthodontist. But braces are a relatively new and unexplored area. Think about how old mankind has roamed this planet. And braces have only been around for a little more than 50 years. They are relatively a new discovery and the types of braces have really exploded in recent years. In fact braces have gone from the metal attachments all the way up to the newest type of braces in which you can remove them each night; Invisalign braces.