We're marking a very special edition of American Pi Day - 3/14/15 (using the US date format).
It seems there's a glut of videos and articles being published, so I've not done anything special this year.
But, of course, I have contributed my fair share of Pi-related Numberphile videos in the past (see below).
My favourites are probably the Mile of Pi and Pi with Pies.
(Fun challenge - press play on all the videos below and listen to the Pi cacophony!)
The recent death of Leonard Nimoy has people talking not just about Nimoy (a much loved actor and man, by all accounts) but also the lasting impact of his famous Mr Spock.
I enjoyed this Incomparable podcast on the topic.
But from a purely science perspective, Mr Spock (and Nimoy) have probably inspired more scientific careers than we realise.
This came through a while back in a video I made for My Favourite Scientist:
There has been lots of interest in the latest Objectivity video about signatures in the Royal Society Charter Book.
The video focuses on Alan Turing and Stephen Hawking (because of recent news at the Oscars).
However if you want to see more of the book, there is a video last year from "sister channel" Periodic Videos which has more details.
The latest in Numberphile's calculator unboxing series featured Matt Parker and The Little Professor.
Dr James Grime was more serious in his discussion of the famous educational toy.
For all the unboxing videos, click here.
Filming the latest round of Objectivity at the Royal Society, what a nice surprise to meet fan Vasilis, from Greece.
He was holidaying in London and decided to visit the Royal Society's library after seeing it featured in our films.
I suspect Vasilis was mainly hoping to meet the likes of Keith, our star librarian (which he did).
But he was pleasantly surprised to be allowed to view documents and objects from the archive (as any visitor to the society can!).
Vasilis spent many hours poring over old manuscripts and I think he had a great time.
Our Numberphile video about Gauss and the 17-gon was posted this week.
Here's David's Heptadecagon:
But equally exciting have been these efforts by Numberphile viewers.
Note these are compass and straight edge constructions. That's the point.
@dullahansolo
Charles Via Facebook
@ProgrammerHero
@enfo14
@JosselieNoirel calls this a heptafaildecagon
@kolekracaw used Geometer Sketch Pad
Earlier effort by @kolekracaw
@FordFiesta_
@MrCamago
I've not made a specific video for Valentine's Day this year - but here are some previous efforts.
We joke about this one being filmed on February 14 because we both had no other plans!