As any historian of medieval East Asia or player of Civilization V: Brave New World will tell you, 15th century Koreans were really, really, really good at science.
A statue of King Sejong the Great in Seoul. Thanks, guy! Photo by Republic of Korea/Flickr.
Under the judicious rule of Sejong the Great, the kingdom's top researchers spent a lot of time looking at space and making maps of it.
In 1437, during one of these looking sessions, a bunch of scientists thought they discovered a bright new star, one that easily outshone everything else in the sky (eat it, Luyten 726-8A).
14 days later, it disappeared.
Unbeknownst to the ancient sky-watchers, the "new star" was not new at all. It was, instead, what's known as a "classical nova" — an ultra-dense, white dwarf star that sucks so much matter off a neighboring star it causes a giant, nuclear explosion. The star gets super bright for a short period of time before once again fading into the cosmic background — like a stellar version of Pokémon GO.
The problem is, 15th century Korean scientists didn't exactly keep the best records. For starters, it was the 15th century, and pretty much everyone had rickets. Also, the modern Korean alphabet wouldn't be invented for another seven years.
You'll be shocked to learn the location of the star that went nova was lost to time.
Until now.
After 580 years of searching, a team of researchers from four continents has finally located the star, making it the oldest such nova to have its location accurately documented.
Lead researcher Michael Shara had spent nearly 30 years looking for remnants of the stellar explosion, known as Nova Scorpii. (A great name for any Dutch speed metal band that might be looking, btw. Don't sleep on it!)
Shara told The Atlantic's Marina Kornen that attempting to locate the site had been like "searching for a needle in a billion haystacks." Initially, the American Museum of Natural History curator and his team believed they'd find the nova between two stars in the constellation Scorpio. With the aid of online astronomical catalogs, which weren't a thing the first time Shara looked back in the 1980s, the astronomers combed through records of hundreds of millions of stars until, eventually, they focused in on a planetary nebula near the original search area.
In a classic "That's no moon, it's a space station" moment, the team rapidly realized that the nebula was the nova — or at least the remnants of it. They had been looking between the wrong two stars the entire time.
The team published its findings in the August edition of Nature.
"When we relaxed our criteria as to where to look in the constellation, we found the nova in 90 minutes," Shara told Space.com.
Image by K. Ilkiewicz and J. Mikolajewska.
This 2016 image, taken by a telescope in Chile, shows the star — indicated by two long, red hashmarks — surrounded by the cloud of hydrogen it ejected in 1437. The smaller red "plus sign" in the center shows the star's location at the time it went nova almost six centuries ago.
Thanks to research by Shara and others, we know a lot more about novas than we did in 1437 — and even more now that Nova Scorpii has been tracked down.
In addition to classical novas, astronomers have observed frequent "dwarf novas" — much smaller explosions — across the visible universe. Shara has long suspected that both types of novae arise from the same star systems at different points in time rather than from different systems altogether.
Images from the 1930s and '40s, published in the paper, show the star pair that produced the 1437 nova undergoing a series of dwarf novae — lending Shara's theory some weighty backup.
Whether you specifically care about the dynamics of matter exchange in binary star systems of not, it's hard to deny that — holy crap — this is amazing.
Image by tyrogthegatekeeper/Wikimedia Commons.
When those 15th century Korean astronomers looked at the sky, they knew they were witnessing something important about their universe.
With the right tools, some tenacity, and a bit of luck, human beings have made it possible to find out what that is. Even after a 600-year search.
Science, then, as now, totally rules.
"Now your fishes will be warmed."
"To have one’s eyes lined with ham."
"To lay your head in water."
"Repetition teaches the donkey."
"I only understand train station."
"To speak directly from the liver."
"Horse horse, tiger tiger."
Beaver in water. Photo by 
An actual beaver dam on the now-thriving Price River
Medusa image of giant squid in Gulf of Mexico off of Mississippi Gulf CoastPhoto credit: 
Sign warning against feeding alligators next to alligator in Mississippi marshlandsCourtesy of Jacalyn Wetzel
Mississippi Gulf Coast beach in BiloxiCourtesy of Jacalyn Wetzel
2009 photo of giant squid caught in Gulf of Mexico near Mississippi GulfPhoto credit: 
Thank goodness this story has a happy ending.
There's a reason why some people can perfectly copy accents, and others can't
Turns out, there's a neurodivergent link.
A woman in black long sleeve shirt stands in front of mirror.
Have you ever had that friend who goes on vacation for four days to London and comes back with a full-on Queen's English posh accent? "Oooh I left my brolly in the loo," they say, and you respond, "But you're from Colorado!" Well, there are reasons they (and many of us) do that, and usually it's on a pretty subconscious level.
It's called "accent mirroring," and it's actually quite common with people who are neurodivergent, particularly those with ADHD (Attention Deficit Hyperactivity Disorder). According Neurolaunch, the self-described "Free Mental Health Library," "Accent mirroring, also known as accent adaptation or phonetic convergence, is the tendency to unconsciously adopt the accent or speech patterns of those around us. This linguistic chameleon effect is not unique to individuals with ADHD, but it appears to be more pronounced and frequent in this population."
Essentially, when people have conversations, we're constantly "scanning" for information—not just the words we're absorbing, but the inflection and tone. "When we hear an accent, our brains automatically analyze and categorize the phonetic features, prosody, and intonation patterns," writes Neurolaunch. For most, this does result in copying the accent of the person with whom we're speaking. But those with ADHD might be more sensitive to auditory cues. This, "coupled with a reduced ability to filter out or inhibit the impulse to mimic…could potentially explain the increased tendency for accent mirroring."
While the article explains further research is needed, they distinctly state that, "Accent mirroring in individuals with ADHD often manifests as an unconscious mimicry of accents in social situations. This can range from subtle shifts in pronunciation to more noticeable changes in intonation and speech rhythm. For example, a person with ADHD might find themselves unconsciously adopting a Southern drawl when conversing with someone from Texas, even if they’ve never lived in the South themselves."
People are having their say online. On the subreddit r/ADHDWomen, a thread began: "Taking on accents is an ADHD thing?" The OP shares, "My whole life, I've picked up accents. I, myself, never noticed, but everyone around me would be like, 'Why are you talking like that??' It could be after I watched a show or movie with an accent or after I've traveled somewhere with a different accent than my 'normal.'
They continue, "Apparently, I pick it up fast, but it fades out slowly. Today... I'm scrolling Instagram, I watch a reel from a comedian couple (Darcy and Jeremy. IYKYK) about how Darcy (ADHD) picks up accents everywhere they go. It's called ADHD Mirroring??? And it's another way of masking."
(The OP is referring to Darcy Michaels and his husband Jeremy Baer, who are both touring comedians based in Canada.)
Hundreds of people on the Reddit thread alone seem to relate. One comments, "Omfg I've done this my whole life; I'll even pick up on the pauses/spaces when I'm talking to someone who is ESL—but English is my first language lol."
Sometimes, it can be a real issue for those around the chameleon. "I accidentally mimicked a waitress's weird laugh one time. As soon as she was out of earshot, my family started to reprimand me, but I was already like 'oh my god I don’t know why I did that, I feel so bad.'"
Many commenters on TikTok were shocked to find out this can be a sign of ADHD. One jokes, "Omg, yes, at a store the cashier was talking to me and she was French. She's like 'Oh are you French too? No, I'm not lol. I'm very east coast Canada."
And some people just embrace it and make it work for them. "I mirror their words or phrase! I’m 30. I realized I start calling everyone sweetie cause my manager does & I work at coffee shop."