From Warhammer 40k - Lexicanum
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18:25, 13 March 2025
===Biology===
[[Image:TauXenology.jpg|thumb|left|200px|Tau Ethereal{{Fn|1}}]]
There is strong implication from the similarities between an On their foreheads resides a small diamond-shaped organ possessed uniquely among Tau by the Ethereals, and with a rigid carapace that contains ultra-dense hormonal fluids which emits an organ which [[Q'orl]] queens use in pheromonal communication, that this ability may be due to deliberate engineering in the Ethereals' past, likely by the [[Aeldari]].{overpowering scent{Fn|1}} On their foreheads resides a small organ, smaller than the ones the and comparative Imperial studies of other Tau castes haveshow comparatively smaller olfactory cavaties{{Fn|1}}. Imperial studies on the diamond-shaped organ show no biological function, but it's suspected that the Ethereal studied is a dud, or that the way the Ethereal control the Tau might be pheremonal{{Fn|1}}, if not in a different way that is more esoteric in nature{{Fn|4}}
===Ranks===
