Henry Liu, a civil engineering professor who is leading a study through the University of Michigan, said the rollout of a new traffic signal system could be a lot closer than people realize. Traffic lights haven’t changed much in the U.S. over the years. Cleveland debuted what is considered the first “municipal traffic control system” in 1914, historian Megan Kate Nelson wrote for Smithsonian Magazine.
The night sky was lit up by the northern lights Friday in locations the auroras don't normally shine as a severe solar storm supercharged the display.
To the casual viewer, competing at the Westminster Kennel Club dog show might look pretty simple: Get a dog. It's a year that has been challenging for the kennel club: the show chairman died last fall and a planned judge was charged in March with possession of child sexual abuse materials. Here are the ins and outs of Westminster, which is set to start Saturday with an agility competition at the USTA Billie Jean King National Tennis Center in New York: HOW MANY DOGS?