DescriptionThis repository provides the complete data and code required to reproduce the analyses for the Biology Letters submission on mammalian pace-standardised lifespan (PSL) across 28 taxa (n = 28). Version note (v3)This is the third release of the replication package. Earlier versions (v1 and v2) are superseded by v3, which resolves minor path inconsistencies and ensures full compatibility between the scripts and the manuscript figures. Please use v3 for all verification and reproducibility purposes. 1) Statistical analysis package (PSL_Analysis_v3.zip) Contents: Core input data and R scripts for OLS and PGLS models evaluated across 100 posterior mammalian trees.How to reproduce: Run source("run_all.R") in R, or Rscript run_all.R from the terminal.Outputs: Results are written to the /results folder. Session information (including package versions) is saved to /docs/sessionInfo.txt.Note: This package focuses on the core statistical outputs reported in the manuscript (e.g. slope, confidence interval, and R²) to ensure direct alignment with the text. 2) Figure generation package (PSL_Figure_v3.zip) Contents: Python scripts (make_fig1.py–make_fig3.py), figure-specific Excel workbooks, and documentation for reproducibility.How to reproduce (Windows): Double-click RUN_FIGURES_WINDOWS.bat.Outputs: Figures are generated as Figure1.pdf, Figure2.pdf, and Figure3.pdf in the /figures directory.Note: For internal consistency, PSL is labelled as “E” in the main workbook and “LEP” in the ANOVA workbook; these are identical values.