Huh. You learn something new every day here.
(But, you say “kar-thuj” while I say “kar-thayj,” you know.)
Nitpick: There’s no U in Colombia.
New South Wales is pretty old, geologically speaking.
New Kids On The Block. Those dudes are approaching middle age and had a song on the radio within the past couple years.
{ducks and flees}
Pick well nitted.
Novels, as in book-length stories, were a new concept in the mid-1500’s. Hence the name, which basically means “a new way of telling a story”.
The concept is not so novel anymore. 
The New River
Estimated 260 to 325 million years old.
(It hasn’t actually been called that for so long, I just find it amusing…)
/Nitpick
You’re looking for “nit well picked” as nit is the noun and pick is the verb in “nitpick.” 
New Street in Birmingham (mostly known today for being where the train station is in Birmingham) was first recorded as novus vicus in tax rolls from 1296. Excavations and its geometry suggest that it was built around 1150 to service the new textile markets.
Good one! I wanted to post that. The New River is older than the Appalachian Mountains because it cuts right smack across them. It’s a wonder that its course wasn’t completely altered by the orogeny, but the river cut its way through the uplifted rock as fast or faster than the uplift. It’s like cutting a log by holding the chainsaw still and lifting the log up against it from beneath.
I wouldn’t even call it jocular. There’s really not a good name for it if you’re describing its historical discovery. It’s not the Western Hemisphere, as that starts in the middle of England.
While that may be the technical definition, more loosely that can be used to refer to the Americas alone and frequently is.
It’s newer than some of these other things, but there’s also a New Mosque in Istanbul, constructed in the late 16th through mid-17th century.
beards. it seems that every fifteen years or so, there’s a new love-affair with beards. something that’s been around as long as faces can’t be all that new.
Every once in a while, there’s a news report about a new something-or-other that’s been discovered in outer-space (star, comet, asteroid, etc.). While the discovery may indeed be new, the thing itself is often perhaps millions or billions of years old.
[Foghorn Leghorn]
I say, I say there. That’s a joke.
(Insert “That boy’s about as …” joke.)
[/Foghorn Leghorn]
Anyway, the name of Novgorod (“New City”) in Russia seems to date to the 10th century, while the original town existed at least 100 years before that. OTOH, the name of Novosibirsk only dates to 1926 (its prior name of Novonikolayevsk dates to 1893).
“New”, once part of a name, seems to really stick around.
New word learned; thanks.
I love the way SDGQ guys, myself included, will use a deeply technical word sprinkled among relaxed general descriptions, because you can probably figure it out, and if you can’t, the rest of the post should make perfectly fine sense anyway.
Neutron, with a tip of the hat to the German language. Many may be as old as 13.8 billion years.
Newcastle upon Tyne is called after a castle built in the 11th century. According to Wikipedia, “The town was henceforth known as Novum Castellum or New Castle.”
The Sanskrit name Navadvipa or “New Island”* was applied to land formed by a changing rivercourse at the confluence of the Bhagirathi and Jalangi rivers in (what is now) West Bengal, India, at least as early as the eleventh century CE.
It has been called by various dialect variants of Navadvipa (e.g., Nadiya, Nadia, Nuddea, Naodah, Nabadvip, etc.) ever since.
*Unless it meant “Nine Islands”, the word nava meaning both “nine” and “new”.