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Mom of world’s youngest Mensa member reveals the 3 ways they realized they had a mini-genius

8 2
27.06.2025

There are lots of smart children: ones who potty-train easier than others, pick up reading at a young age, or can play complex instruments before kindergarten. Then, there are genius children. One little boy in the United Kingdom is the latter, who quietly made history by becoming the youngest person admitted to Mensa, the exclusive intellectual organization that only accepts masterminds with an IQ of 132 or above—for those who aren’t in Mensa, that’s less than two percent of the population. So, how old was little Joseph Harris-Birtell when he was admitted to Mensa? A mere two years and 182 days. There are professional sports teams with World Series champion droughts longer than that—much longer.

Born on November 23, 2021, parents Rose and David Harris-Birtell say that Joseph has been extraordinary since birth. “It soon became clear that he was an exceptional little being,” Rose told the Guinness Book of World Records. Perhaps this isn't surprising, considering both his parents are academics: Joseph's father, David, is a Senior Lecturer at the University of St. Andrews and Rose is an Honorary Senior Lecturer at the same institution. “He is very kind and loving, confident and curious, and incredibly determined,” Rose said. “He loves a challenge and is really exhilarated by complexity, whether learning chess or poring over new words and concepts that he hasn’t come across before.”

Beyond intellect, Joseph is kind and loving, too. Guinness World Records

But when did the Harris-Birtells know they had a prodigy on their hands, that their son wasn't just smart, but a genius? Rose describes three signs that tipped them off:

Joseph loves a challenge.Guinness World Records


And that was only the beginning for young Joseph. Since then, his mother says that the pint-sized genius has also begun to learn morse code, taught himself the Greek alphabet, and is “interested in the periodic table,” adding, “His interests are vast and varied, and he is always keen to learn more and loves a challenge.”

Before Joseph, the youngest member to join Mensa was Isla McNabb, who was two years and 195 days old when she was admitted to the prestigious club in 2023. The Crestwood, Kentucky native scored in the 99th percentile of intelligence for her age on the Stanford-Binet Intelligence Scales, which led to her parents to look into Mensa.

What do you do when a truly gifted child comes along, like Joseph or Isla? Joseph’s achievement highlights a challenge for many parents: supporting a child who has needs that do not fit conventional standards. Whether a child is academically advanced, a creative virtuoso, or has different learning abilities, their parents inevitably struggle to find support and understanding.

Joseph's mom hopes his story can raise awareness for children with different needs. Guinness World Records

“It is a common misconception that everything is super easy for gifted children,” Rose explained to Guinness Book of World Records.

She continues,

Yes, Joseph’s story is remarkable, and it’s a joy to marvel at a genius child. But it’s also a reminder that every child is unique, with their own needs and challenges, and they should be celebrated, too. Instead of trying to force them to fit a prescribed mold, or “be like everyone else,” Joseph is a shining example of what can happen when a child is allowed to thrive and dance to the beat of their own drum.


Life can be bleak, so we’re going to be celebrating the small joys while we can—whether that’s asweet snack that boosts your mood (courtesy of our friends atAll In), or a picture so incredibly goofy it restores your faith in the algorithm (even if only for a second). These momentary mood boosters are everywhere you look—you just have to be able to find them underneath all the noise. And that’s where we come in.

Consider this weekly web series your cheat sheet to the best of the Internet—not just random memes to make you laugh, but examples of people truly finding something extraordinary in the mundane. Each Friday we'll be delivering five pieces of media that allow you to stop for a second, take a breath, and feel just a little bit brighter among the daily stress. (Think of us as your chronically online bestie who knows exactly how to make you smile, exactly when you need it the most.)

Ready to smile? Here we go.

1. Unplanned triplets

@murdockmultiples The first of many family reactions to our spontaneous triplet news! Telling my parents we were expecting spontaneous triplets 👶🏻👶🏻👶🏻 And yes my dad didn’t understand that “Baby B” meant twins at first 😂 #spontaneoustriplets #tripletreaction #triplets #murdockmultiples #murdocktriplets #surprisetriplets ♬ original sound - Murdock Multiples

Pregnancy reveals are always fun to watch, but this one is three times as exciting. In this viral TikTok clip, these new grandparents get exciting news when their adult daughter tells them she is pregnant with twins. But wait–there’s more. In what’s probably the shock of their lives, she then reveals that, on second glance, there’s a third baby in there. As in, spontaneous triplets. Three babies. Unplanned. Their reaction is both adorable and totally real: “I don’t even KNOW people with triplets!” Congrats, grandpa–you’re the people, now!

2. Little moments of morning joy

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A post shared by Upworthy (@upworthy)

This week, the All In crew is polling people on the streets of New York City about small, everyday things in the morning that bring people joy, from gorgeous greenery to the early morning sun catching the light in just the right way. Just listening to these is making us feel super relaxed.

3. This teacher doing the absolute most for Pride Month

@joey_.veres Mr. Folnsbee the ally that you are @nadipowers @lanie @Fatty ♬ suono originale - 𝙎𝙊𝙁𝙏𝙇𝙔

Meet Mr. Folnsbee, a high school teacher from Horseheads, New York who’s taking Pride Month to the next level. In support of Pride Month (and, presumably, the LGBTQIA students at his high school), Folnsbee lets students bedazzle his head with rainbow gemstones—so much so that it looks like a giant, glittering Pride flag. Talk about setting a good example for the next generation!

4. The "goodnight" trend

@sydsacks I’ve been cracking up at this trend so I made Peter call his besties to say goodnight 🤪 #goodnight #besties ♬ original sound - syd

Calling a friend and wishing them goodnight is a sweet gesture, right? What if the person you were calling was someone you haven’t spoken to in years, or someone with whom you’re just a casual acquaintance? That’s what people are doing in this new TikTok “prank,” and the results are so funny they’ll have you crying. They’re also so sweet, as the responses range from being confused but polite, to wanting to have a long conversation,........

© Upworthy