Editing 1867 in science (section)

==Technology==
[[Image:CovingtonKY JARoeblingBridge.jpg|thumb|210px|right| January 1: [[John A. Roebling Suspension Bridge|Roebling Suspension Bridge]] is longest.]]
[[Image:SuezCanalKantara.jpg|thumb|210px|right|February 17: [[Suez Canal]] in use.]]
* January 1 – The [[John A. Roebling Suspension Bridge|Covington–Cincinnati Suspension Bridge]] opens between [[Cincinnati]] and [[Covington, Kentucky]], its 1,057-foot (322 m) main span making it the longest single-span bridge in the world by a margin of 14 m at this time. It will be renamed after its designer, [[John A. Roebling]], in 1983.
* February 17 – The first ship passes through the [[Suez Canal]].
* July 2 – First elevated [[railroad]] in the United States begins service in New York City.
* December 14 – Spanish inventor [[Narcís Monturiol]] submerges his [[submarine]] ''[[Ictineo II]]'' at [[Barcelona]], demonstrating its chemically fired anaerobic steam propulsion system.<ref>{{cite book|last=Stewart|first=Matthew|authorlink=Matthew Stewart (philosopher)|title=Monturiol's Dream: The Extraordinary Story of the Submarine Inventor Who Wanted to Save the World|publisher=Profile Books|year=2003|location=London|page=312|isbn=978-1-86197-470-9}}</ref>
* [[Pierre Michaux]] invents the front wheel-driven velocipede, the first mass-produced bicycle.