Chris Ferrie

Hey everyone! I'm Chris Ferrie, the #1 best-selling science author for kids. Glad to be here and looking forward to sharing some insightful things! 😁

10² + 24² = 26² 📐 Happy Pythagorean Theorem Day! Today (10/24/26) is the last of the entire 21st century! The next 4 March 2105 (3/4/5).

People are always suggesting new Baby University titles, from basic science topics to the Nuclear Non-Proliferation Treaty for Babies (no joke). So I built a site where you can design a book cover and vote on what should exist. Enough votes might just convince the publisher! babyuchallenge.com

Post the credit card surcharge ban, business owners who despise their customers are hiding fees under new pretenses. Let's crowdsource this! surchargesheriff.com

The big bank lobby is out in full force, trying to ruin my day of paying the advertised price... csferrie.medium.com/card-surchar...

Weekend musing... csferrie.medium.com/you-will-nev...

Purchased!

Have you done your daily turddle?

Since everything is going to shit and polishing a turd is harder than you think, I present: turddle. csferrie.github.io/turddle/

Correction: racing to results was always pointless. If AI prevents academic fiefdoms, I, for one, welcome our robot overlords.

I'm starting to think the techbros want the singularity to happen just to deflect the blame... csferrie.medium.com/if-an-ai-com...

My new email signature: If you click the ❤️ reaction button on this email, I will print 1,000 copies of the new email in my inbox notifying me that you reacted ❤️ to my email, construct an elaborate papier-mache effigy of you from the printouts, and ceremonially burn it in a dumpster.

Colloquium by @csferrie.com (author of the Baby University books) at @leidenscience.bsky.social on 'What you shouldn't know about quantum physics' Of course on a day that I'm not in Leiden 🥹. Bad news for me, good news for you since you can just register www.universiteitleiden.nl/en/events/20...

A government struggling with problems at home discovers the political value of having a foreign enemy, settles on Canada, turns trade grievances and border tensions into patriotic outrage, watches the media amplify every provocation, and then discovers that a fake crisis can become very real.

People out here making fun of teenage boys for their high taper fades not knowing how old-school cool it is. Here's a student with Robert Millikan circa 1930, building electroscopes to detect cosmic rays, who looks like he jumped out of a 2026 barbershop window ad.

Did you know there’s a #SciArt competition happening across some of Australia's research centres right now? 🔭🧫🌱⛅ Scientists are sharing their research in creative ways! 🧑‍🎨 AND you can vote for your favourites! 🤩 Check them out here: scienceart.com.au/voting/ Voting closes August 14 🗳️ #SciComm

Just working through my census answers...

I recently appeared in Petr Lebedev's new video on Cosmic Fine-tuning. youtu.be/oi91kE_wocs?...

It's even free! csferrie.com/fun/quantum-...

I'll fight anyone who disagrees ;P medium.com/@csferrie/a-...

Uranus has entered the chat.

How quick are your <bra|ket> skills? I turned an old card game into an app: bra-kets.replit.app.

I used to pay $600 and now enjoy a "100% savings." How much am I paying? In the new math, here's how you figure it out. $600/$600 = 1×100% rise. So if the price is $600 and drops to $600, that's a 100% savings.

When Einstein developed general relativity the closest thing to a practical application that could even be imagined at the time was a slightly more precise description of where to look for the planet Mercury in the sky, and yet now we’d all be literally lost without it. Anyway: fund basic research.

Before you read on, comment what you think the A in sonar stands for. csferrie.medium.com/what-does-th...

McDoing is a great term to describe the modern trivialization of existentialism as consumable performance. Anguish is content, commitment is a vibe.

Game idea: reverse of LIFE. Instead of building a family, you spend the whole game trying to get your teenagers to leave the house with enough confidence to fail somewhere else.

You’ve seen me harping about bureaucracy for over a decade. My colleagues have always seen me as a troublemaker for it. But now here we are, paralyzed and poisoning our children. It’s finally boiled over. csferrie.medium.com/for-teens-so...

Apropos of nothing at all, please enjoy this game. Goal: collect tacos, books, and lattes while avoiding guns, red hats, and foxes. codepen.io/csferrie/ful...

PSA: nothing about quantum entanglement is faster than light. Popular quantum physics in a nutshell: Make stupid assumptions, win stupid conclusions.

Government™️: making things difficult only for those that already followed the rules. james.cridland.net/blog/2025/au...

More on ARC job cuts & restructure: ARC’s spending $374k on consultants for organisational “review” & “planning & development”. They’re also spending $765k on “risk management”. That’s $1.1 million on consultants being spent over 1 year. Un. Believable. Slow clap, ARC.

My nephew (age 3.5) is coming to visit my lab next week and his top priority is checking whether or not I have all the items in @csferrie.com's "Goodnight Lab." I made sure I know where the multimeter is and I found a spectrometer down the hall so he won't think I'm a fraud! 📘🧪😂

"Los terraplanistas son el extremo de un espectro del fraude que puede sonar divertido sin ser peligroso, pero cuando el fraude entra en la medicina puede tener consecuencias catastróficas" _ @csferrie.com

Amazon is nearly giving away books. Go read words on paper!

Lazy parenting hack. Chop up fresh veggies and just leave them out. The kids eat three times as many servings as they avoid during meal time.

You do not want to be one of my open tabs to the right of this one.

It's easy to forget that #SciComm is for people of ALL ages, not just adults and teenagers. But is there an age that's too young? NOPE! (1/7) 🧪

Quantum beer "night" with Wish You Were Beer Show going live in two hours (that's 8PM ET and 11AM AEDT). www.youtube.com/live/BSNTPVX...

Quantum tunneling is back in the news! www.youtube.com/watch?v=yH60...

Blog post: "Actually, you can't test if quantum uses complex numbers" algassert.com/post/2501 I doom the concept of that 2021 Nature paper by showing how to compile any distributed quantum protocol into real-only gates while preserving locality.

🚀 New book: The Curiosity Chronicles — a pick-your-quest science adventure! See the plot map + extras: thecuriositychronicles.com Build your own with my free Adventure Builder: csferrie.com/adventure-bu... #STEM #KidLit

Replacement rubber foot for a Microsoft Surface Laptop and the packaging it came it...

Internet. You know what to do.

If you want something done right, do it yourself. Rant/tool to instantly generate QR codes 👇 csferrie.com/blog/an-actu...

I came for the "thank you" chocolates but stayed for the teacher's saying: "I had a chance to meet with a few of the students today and they were still buzzing. "