Robert McNeill (Neill) Alexander, CBE FRS[1][2] (7 July 1934 – 21 March 2016) was a British zoologist[3][4][5] and a leading authority in the field of biomechanics.

[6] His PhD research at Cambridge was supervised by Professor Sir James Gray, FRS.

Subsequently, he concentrated on the mechanics of terrestrial locomotion, notably walking and running in mammals, particularly on gait selection and its relationship to anatomy and the structural design of skeletons and muscles.

"[11] Modifications to the original formula gave rise to revised estimates, and "Alexander (1996) argued that based on the bone dimensions of Tyrannosaurus it is unlikely they could have travelled at more than 8ms−1.

[18] (This is a small sample from over 250 papers[19]) "All text published under the heading 'Biography' on Fellow profile pages is available under Creative Commons Attribution 4.0 International License.” --"Royal Society Terms, conditions and policies".