Tennis’s U.S. Open has only been an “open” since 1968. Here’s why.

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All five answers to the questions below have something in common. Can you figure it out?
The ancient Egyptian monument, thought to depict the likeness of the pharaoh Khafre, confounds scholars to this day.
In 1993, just 34 days after the Waco siege ended, NBC premiered 'In the Line of Duty: Ambush in Waco'—a TV movie greenlit, scripted, and largely shot while the tragedy was still unfolding.
It takes the average person 45 seconds to find the car with its headlights on. Can you beat that time?
It's known as "middle-aged groan," and it afflicts millions who dare try to get off the couch.
The 1692 Salem witch trials caused so much turmoil that the Massachusetts town is still synonymous with them.
The decade of excess was all about blockbusters like 'Top Gun' and franchises like 'Star Wars' and 'Indiana Jones.' Which sounds familiar.
The controversial 1964 children's book about a codependent tree was adapted into a 1972 animated short.
Whether you’re a nostalgic kid-at-heart or a parent shopping for kids of your own, here are some fun retro back-to-school products from the 1970s, ‘80s, and ‘90s that you can still buy today.
Cars with wood paneling used to be all the rage. And yes, it made perfect sense at the time.
There are hundreds of different Renaissance fairs that take place across the world, and not all of them actually take place during the Renaissance.
Before now, you could only make your own Funko Pop! at one of two Funko stores on the West Coast.
These terms are sure to blow your wig.
There’s much more to this iconic statue than a couple of absent appendages.
BirdCast tells you how many birds are flying overhead on a given night, which species are coming and going, and more.
Two events in Cameroon are the only recorded instances of limnic eruptions. Scientists are trying to prevent a third.
There are a dozen historical figures’ names hidden in the word search—the first three you spot are coming to your next dinner party.
First, you have to understand the difference between England and Britain (and the UK, while we’re at it).