Ever wonder why the color purple has long been known as the color reserved for royalty?
I’ve blogged before–actually a few times–about what a dismal job it was to be a textile dyer, over the course of centuries. Before the… Read More
The first traffic light was installed at a busy London intersection in 1868. It was a revolving lantern with green and red lights, illuminated by gas and operated by a hand-held lever at its base. In 1869 it exploded, injuring the officer that was operating it.