Science

A TDS meter cannot measure total dissolved solids

Total dissolved solids is defined as a weight — filter, evaporate, weigh the residue at 180 °C. A handheld pen measures electrical conductivity and multiplies by a factor chosen to mimic an assumed water chemistry. Published factors run 0.50 to 0.82, so one sample can read 110 or 180 ppm depending on which curve the meter is set to.

11 Sep 2026 · 6 min read

Sustainability

Nvidia Signed Eight Australian Partners for 2GW. The Country Runs on 1.6.

More than doubling a national computing load by 2027, spread across eight balance sheets. No site list, no phasing and no grid connection dates have been published.

11 Sep 2026 · 5 min read

Science

The Fluid Blowup Proofs Are Machine-Checkable. The Competing Claim Was a Press Call.

Buckmaster and Alpöge published three preprints with Lean formalisations anyone can run. The results are for forced equations, and they are not the Millennium Prize problem.

9 Sep 2026 · 6 min read

Sustainability

Google Picked 16 Asia-Pacific Climate AI Teams. No Funding Was Disclosed.

Three months of mentorship and access to five specialist environmental models, starting with a Singapore bootcamp. Access is the meaningful transfer here, and it is not a grant.

8 Sep 2026 · 6 min read

Statistics

AI-Disclosing Advisers Grew Headcount Twice as Fast. They Already Were.

Astraeus finds 15 per cent growth against 8 across 6,384 firms. The adoption signal is a line in a regulatory filing, and the report itself says adopters were growing faster beforehand.

7 Sep 2026 · 6 min read

Science

One Event at 2.6 Sigma Is Not a Dark Matter Discovery, and LZ Says So

A single interaction in ten tonnes of xenon that the background model cannot easily place. The collaboration's spokesperson: we are not claiming to have seen dark matter.

7 Sep 2026 · 6 min read

Statistics

The annual Sharpe ratio hides an assumption about your returns

Annualising a monthly Sharpe ratio by multiplying by the square root of twelve is not a unit conversion. It is Andrew Lo's general formula evaluated at zero autocorrelation — and at a monthly autocorrelation of 0.3, unremarkable for anything not marked daily, it overstates the annual figure by roughly a third. The error also runs the other way, which most write-ups miss.

5 Sep 2026 · 7 min read

Science

One sky, three verdicts: why Singapore says unhealthy and Malaysia says moderate

The same 70 micrograms of fine particulate reads 116 on Singapore's PSI, 96 on Malaysia's API and 161 on the US AQI. Almost all of the difference sits in one number — the concentration each treats as index 100 — and Malaysia's is 75.5, which is 2.16 times its own national standard and a WHO interim target rather than a destination.

4 Sep 2026 · 6 min read

Statistics

A distress-zone Z-score does not mean a 70% chance of bankruptcy

The Altman Z-score's famous 70% is the share of firms that DID fail which had scored in the distress zone — a sensitivity, measured after the fact. Read as a bankruptcy probability it requires 19.4% of US industrial firms to fail every two years. Our own calculator made this error until this week.

4 Sep 2026 · 6 min read

Science

NASA's Roman Telescope Has Hubble's Mirror and a Hundred Times the Field

Launched 30 August and en route to L2, with first images expected in early 2027. It is a survey instrument, so the output that matters is a catalogue, not a picture.

4 Sep 2026 · 6 min read