The riddle below dates back to the 19th century—can you figure it out?

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The U.S. and USSR employed spies, quelled internal dissent, made allies abroad, and stockpiled nuclear weapons in this proxy war.
LEGO bricks are notorious for being indestructible, but one color is an exception.
Old maps are littered with islands that have vanished. What happened to these strange and unexplainable lost lands? Did they ever exist in the first place?
Swedish engineer Salomon August Andrée and two companions wanted to fly a hydrogen balloon over the North Pole. Their Arctic mission didn’t go as planned.
When something goes wrong with your car, a curious-looking icon illuminates on the dashboard. But what those symbols mean isn’t always obvious.
Since 1789, Congress has sent 33 constitutional amendments to the states for ratification. Here’s the scoop on the six amendments that didn't make the grade.
‘Mr. Payback’ might not have set the box office alight, but it did at least try to pioneer a new form of entertainment.
The code name for the American mission: Operation Little Vittles.
The space agency helped out on a landmark criminal case in 1990.
From Acadia to Zion, the U.S. has some pretty majestic national parks. Here’s one fun fact about every single one—plus a map so you can see where they all are.
It’s time to play Tune Twist, where we translate the lyrics of popular songs into multiple languages and then back into English. Can you figure out what the song is, or who performed it?
Latin isn’t widely spoken in Latin America, so why is it called that?
Now that Lester Holt is stepping away from the NBC anchor desk, let’s celebrate the journalist known around the newsroom as “Iron Pants.”
Feeling nostalgic? Some of the most-loved millennial movies like ‘Superbad’ to ‘The Big Lebowski’ have stood the test of time.
Road signs have changed case in the last 15 years or so—here's why.