The Space Marine Morphology page has been updated with an expanded 'Growth and Maturity' section. This is a mix of old material with additional explanation. I've denoted it as 'optional' to make it clear it can be separated out from the main concept, as the main Marine design concept is closely based on canonical information and Jes' notes, while the growth section is wild speculation.
This section deals with the variations in marine size found throughout Games Workshop publications. It's entirely possible for such variations to be natural. Some marines may simply grow taller than others. This does raise an interesting curiosity should this be the case: that in 40K marine heroes tend to be depicted as being taller than 7' and more often 8'. It could be that the larger marines are more heroic? This would further plays into Western ideals of heroes being exceptional by bloodline, and there is nothing wrong in that interpretation, but on its own I find it a little 'narrow' in vision. It could do with some more variations added into the pot. What follows is an additional way to explain why marine heroes tend to be taller. It can be used in conjunction with the first.
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