November 10th, 2013
Beauty of Mathematics speaks for itself, preferably in full-screen mode:
For the record, I can't begin to vouch for the mathematical formulae in the left hand pane bearing any relationship to the phenomena shown in the middle and right hand panes of the video. But it's really pretty, which is way more important than accuracy any day.
August 3rd, 2013
A classmate was caught using his phone in maths. The teacher took his phone and set a passcode. He gave him this back with his phone and said good luck unlocking it.
My first thought upon seeing the above-linked image was 'I hope nobody forwards this link to Michael Gove.'
My second thought was that unless someone comes up with a better solution than passwords for logging in to web sites then one day CAPTCHAs will evolve into something like this and I'll have to give up using the web.
[Via Flowing Data]
July 3rd, 2013
Fact of the day: the world's first pocket calculator was designed by a concentration camp inmate.
Curt Herzstark's fate seemed to be sealed in 1943 when the Nazis sent him to Buchenwald concentration camp. But then Herzstark, the son of a Jewish industrialist, received the unexpected opportunity to become an Aryan.
"Look, Herzstark," one of the camp commandants said to him, "we know that you are working on a calculating machine. We will permit you to make drawings. If the thing is worth its salt, we'll give it to the Führer after the final victory. He'll certainly make you an Aryan for that."
The engineer had made a pact with the devil. Night after night, after daily forced labor in the camp, Herzstark made detailed design plans for the world's smallest mechanical calculating machine. He was given special rations as motivation, and he eventually survived the concentration camp. [...]
I'd seen a CURTA Calculator before, but I didn't know the story behind it.
October 30th, 2011
March 25th, 2009
Marcus du Sautoy on enormous numbers:
1,000,000,000 (one billion)
In the UK, this number used to be called, simply, 1,000 million, while a billion was reserved for a million million (a number with 12 zeros). But pressure to standardise our numbers with the US drove Harold Wilson to announce in 1974 that any government mention of a billion would from then on mean a number with nine zeros.
If you really want someone to blame for the confusion over billions, however, it's the French. Throughout history, they have flip-flopped between different definitions, wreaking havoc on the names of numbers. In 1480, they proposed that a billion have 12 zeros, which is what the British adopted. Then, in the middle of the 17th century, they knocked three zeros off, so a billion became a number with nine zeros. The young United States inherited this new definition. Then in 1948, the French reverted back to the old system.