In a comment on a prior post my friend Amy told me about this Carl Sagan talk about the 4th dimension:
I decided to have the boys watch the video and then talk to start our Family Math project for today. 168 more words
I learned about a new game called “The Witness” from this Vi Hart tweet last week:
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Don't watch twitch streams or look at screenshots or read reviews.
It would have been Martin Gardner’s 101st birthday today (he was born in 1914 and died in 2010) and while he certainly didn’t invent, or even discover, hexahexaflexagons he was one of the first people to popularise them with an article in… 145 more words