A tram (also known as a streetcar or trolley in North America) is a train that runs on tramway track on public urban streets; some include segments of segregated right-of-way. The lines or networks operated by tramcars as public transport are called tramways or simply tram/streetcar.
invented by Lucien B. Smith
Barbed wire, also known as barb wire, occasionally corrupted as bobbed wire or…
invented by Whitcomb Judson
A zipper, zip, fly, or zip fastener, formerly known as a clasp locker, is a…
invented by James Nasmyth
A steam hammer, also called a drop hammer, is an industrial power hammer driven…
invented by Friedrich Serturner
Morphine is a pain medication of the opiate family that is found naturally in a…
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