I'm a former potter with a maths background, and currently work with data at a rural education NGO in South Africa.
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2026-07-22T18:44:41Z Event JSON
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Last Notes npub1l3c2empn67kj2ny0ecff94l9azev2g6y7d3plrdkv08k7dcgq39q75nw2k Pieter Mostert Peter Selinger has come up with a great way of generating hat tilings by overlaying a triangular grid on a periodic pattern, and placing a tile at each point that is not white, with the orientation and handedness of the tile determined by the colour of the point. A more thorough explanation is given in this preprint npub1l3c2empn67kj2ny0ecff94l9azev2g6y7d3plrdkv08k7dcgq39q75nw2k Pieter Mostert The magazine article headline claims that's enough gold and uranium to "fill Earth's oceans", when the very first line describes the amount as having approximately the same mass as Earth's oceans. I know article writers aren't always the people writing headlines, but you'd think someone at Space.com would have noticed the error and fixed it by now. npub1l3c2empn67kj2ny0ecff94l9azev2g6y7d3plrdkv08k7dcgq39q75nw2k Pieter Mostert I once had a heated argument with my grade 6 teacher about the value of \[3\times \frac{1}{3}\]. I claimed it was 1, while she claimed it was 0.9999999 (not recurring, just the number of digits shown by the calculator), since "the calculator is always right". If I recall correctly, the controversy arose after one of my classmates had noticed that the calculator showed 0.3333333 when they calculated \[1/3\], and then observed that \[3\times 0.3333333 = 0.9999999\]. npub1l3c2empn67kj2ny0ecff94l9azev2g6y7d3plrdkv08k7dcgq39q75nw2k Pieter Mostert View towards Lubanzi beach, with Hole in the Wall in the distance npub1l3c2empn67kj2ny0ecff94l9azev2g6y7d3plrdkv08k7dcgq39q75nw2k Pieter Mostert I took a walk down to Mbolompo point this afternoon, and on the way back came across these beautiful iridescent films produced by iron / manganese oxidising bacteria.
