Once a Millennium Alignment of All Three Norths

However, if you watch their video be warned about when the diagonal line crosses the 2° line: their line slopes to the left and moves to the right, whereas my line slopes to the right and moves to the left. This is because the OS is drawing the zero-point for magnetic-vs-grid but I'm doing magnetic-vs-true. Which is a mirror image.

Bonus thanks to Christopher James who put a link to the OS article about this in a maths communication whatsapp group with the message "I hope someone is planning to visit and make an interesting video about this." And thanks to Colin Beveridge who answered some key questions about it in that group.

CORRECTIONS
- None yet, let me know if you spot anything!

Filming and editing by Alex Genn-Bash
Written and performed by Matt Parker
Music by Howard Carter
Design by Simon Wright and Adam Robinson

MATT PARKER: Stand-up Mathematician

[judybassett]

Matt demonstrates that he has the special talent to unfold a map and then fold it back up correctly.

[eatingsfun]

The way matt crosses time and space is seamless.

[notsatan]

I was not surprised that Matt had a spherical chalkboard as I assume he has a chalkboard of every geometric shape

[MrQuickLine]

If I know Past Past Matt, he already knew there was a pub with a mathematically funny name, and therefore felt 100% confident that Future Matt would be in such a pub.

[sambromley]

"if you'll excuse me, I have a future self to go and become" is beautiful and is now how I will end all social interactions I ever have.

[samthomas]

The pure indignation of "The magnetic south isn't even in Antarctica. Someone should look into that" just got me.

[NoobixCube]

I can just imagine Matt trudging about on that windswept coast thinking "how the hell does Tom Scott do this every day?!"

[МатвейТесёмников]

It feels exactly like a Tom Scott video but with Matt, and i like it!

[kieranf.]

4:00 "If you're ever in Dorset I highly recommend coming along". You really dropped the ball on that "endorse it" pun sitting right there.

[benlindquist]

10/10 he stood up whilst performing maths

[billcook]

Matt really needs to add in a fourth north - celestial north. Now because the north pole doesn’t exactly point at the North Star, we need to add in a fourth dimension- time. I believe celestial north will line up with true north (and the other two north’s at exactly that spot) twice a day. So he needs to not only be there, but be there at the right time of day. Follow up video please :)

[zakolache]

I will say Matt, is fantastic at timing his split screen/timeline selves for conversations with himself. Definite improvement over the years with all the future, past, matt2, occasionally matt3.. Quality stuff!

[falpsdsqglthnsac]

it's always nice to know that matt can bend spacetime to his will

[QuantumHistorian]

Took me over half the video to realise that he was talking about the different *directions* north, rather than the different *points* north. I was so confused as to how on earth true north was that far south.

[BrettCoryell]

I’ve spent my whole life learning, loving, and teaching math and physics yet today is the first time I’ve ever seen, heard of, or even conceived of a spherical chalkboard. Love ya Matt. Love ya.

[ollieflj]

“It’s called the square and compass”
“In Dorset?”
“I do, it’s very good indeed”

[maikhildebrandt]

My favorite aspect of this is that Matt came to the very south of the UK to talk about three norths being in the same direction for once

[jonathanedelson]

Total aside: at a lab supply one can purchase cork rings made for holding round bottom glass flasks. Perfect for preventing spheres from rolling around.

[vigilantcosmicpenguin]

That pub was the absolute perfect setting for this. It's like someone built that pub in 1830 and said, someday, someone's going to choose this place as the warm, cozy location to film a maths video.

[prysthaea]

"I have a future me to go become" sounds so deep for an off hand remark.