FOR IMMEDIATE RELEASE
20 October 2026

NetPhysics adds a measured mammal benchmark and publishes an unfavorable primary result

NetPhysics, Christopher Hill's independent research project, has prepared release 0.5.0
with a retrospective analysis of the published PanTHERIA mammal dataset. Source
provenance, inclusion/exclusion records, code, predictions and sensitivities are included.

Among 573 eligible species, a continuous hinge fixed at 10 kg did not improve prediction
on the primary family holdout: RMSE 0.200464 log10 W versus 0.198095 for a single line.
Alternative splits and models are reported, including a modestly different result
under five-fold family cross-validation. This does not establish a universal breakpoint
or prove the absence of all biological curvature.

The update also revises proposed acoustic and elastomer protocols. Those physical
experiments have not been performed. Numerical checks and retrospective analysis do
not establish new physics or validate a universal NetPhysics model.

Source: Jones et al. (2009), PanTHERIA, Ecology, DOI 10.1890/08-1494.1.
Methods and result: https://netphysics.com/projects/metabolic-scaling/
Release: https://netphysics.com/releases/0-5-0/

About NetPhysics: an independent, AI-assisted research and software project examining
geometry, memory and scaling with explicit assumptions and reproducible comparisons.
Media contact: Christopher Hill, chris@maxwellx.com

Prepared project-issued announcement. No independent review, DOI, institutional
partnership, external distribution or media coverage is claimed by this release.
###