Nadia Rahim is a RECATOOLS editorial persona focused on statistics and data literacy: what confidence intervals, averages, correlations and margins of error actually mean, and how they are misquoted. Articles under this byline trace each claim to the primary statistical literature and show the working, so readers can check a number rather than take it on trust.

About this byline

Nadia Rahim is a RECATOOLS editorial persona for statistics and data-literacy coverage. Articles are produced and reviewed under RECATOOLS editorial supervision.

Editorial responsibility for this byline rests with Jeffrey Tan (Tan Seng Fei), RECASYS, Singapore. Our Editorial Policy sets out how sources are reviewed, how AI-assisted workflows are used, and how editorial desks and personas are defined.

84
Articles
Science
Primary beat
Jul 2026
Writing since
~603 min
Total reading
All 84 Science 43 Statistics 22 Sustainability 18 AI & ML 1

Articles · Science Showing 11–20 of 43

Antique glass laboratory apparatus on a metal stand, lit in warm amber light.
Science

22.4 litres is only correct if you say at what pressure

A mole of ideal gas occupies 22.414 litres at one atmosphere and 22.711 litres at one bar, and NIST publishes both as separate exact constants. IUPAC moved standard pressure to 100 kPa in 1982, exam boards went four different ways, and the number that fails is the one with no conditions attached.

16 Sep 2026 · 6 min read
Close-up of a blue-green crystalline mineral with a glassy, layered surface.
Science

Fourteen elements have no single atomic weight

Carbon is printed as 12.011 on every wall chart. IUPAC does not publish a single figure for carbon, or for thirteen other elements — it publishes a range, because their isotopic makeup varies with where the sample came from. Lithium is the widest case, and not for the reason usually given.

16 Sep 2026 · 6 min read
A gibbous Moon in black and white showing maria and rayed craters — the surface the NASA-IBM model was trained to map.
Science

NASA and IBM Open-Sourced a Moon Model. It Is Best at Finding Ice.

Trained on about two million tiles from 17 years of lunar orbiter data. The headline 23 per cent is really three results — 22 on ice, 19 on craters, 3 on volcanic patches.

14 Sep 2026 · 6 min read
A fan of green laser beams radiating from a single bright point in darkness
Science

A Thousand Control Cycles Became One. What That Buys Is Time.

Chalmers researchers compressed control of a quantum encoding into a single Floquet period. The speed matters because quantum states decay while you work on them.

12 Sep 2026 · 6 min read
Two hands dialling a basic keypad mobile phone against a dark background
Science

Twenty Minutes a Week on the Phone Beat the Ed-Tech, at $11 a Child

Five randomised trials, including one in the Philippines, found phone tutoring tripled the gains of the average closure-period intervention. A Sierra Leone trial found nothing.

12 Sep 2026 · 7 min read
Clusters of ripening orange areca nuts hanging from a betel palm trunk
Science

The Oldest Evidence of Habitual Drug Use Rests on Two Sets of Teeth

Arecoline in the dental calculus of two Sulawesi hunter-gatherers, 15,000 years apart. Oldest evidence is a statement about what survives, not about when people started.

11 Sep 2026 · 6 min read
A pair of red over-ear headphones resting on a dark surface
Science

The standard behind your headphone warning advises against the warning

Your iPhone's 80 dB for 40 hours limit comes from ITU-T H.870, implementing WHO recommendations. That standard says dose estimates can be uncertain by hundreds of percent, advises against signalling 'safe' from them, and states that auto-reducing the volume at 100% is not fully protective.

11 Sep 2026 · 6 min read
A half-full glass tumbler of clear water on a weathered wooden table
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
A hand writing trigonometric expressions in chalk on a dark blackboard.
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
A lit tunnel deep underground, with rails running along the floor and pipes and machinery fixed along its arched roof.
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
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