Editing Eyebrow (section)

==Functions==
A number of theories have been proposed to explain the function of the eyebrow in humans. One approach suggests its main function is to prevent moisture (mostly sweat and rain) from flowing into the eye.{{fact|date=December 2023}} Another theory holds that clearly visible eyebrows provided safety from predators when early [[Hominidae|hominid]] groups started sleeping on the ground.<ref>[[Joseph Jordania]], ''[[Why do People Sing? Music in Human Evolution]]'', chapter "I Can See you! Eyespots in Humans." Logos, 2011, p. 96</ref>{{Clarification needed|date=August 2021}}

Recent research, however, suggests eyebrows in humans developed as a means of communication and that this is their primary function. Humans developed a smooth forehead with visible, hairy eyebrows capable of a wide range of movement. Such eyebrows can express a wide range of subtle emotions – including recognition and sympathy.<ref>{{cite journal |last1=Godinho |first1=Ricardo Miguel |last2=Spikins |first2=Penny |last3=O’Higgins |first3=Paul |title=Supraorbital morphology and social dynamics in human evolution |journal=Nature Ecology & Evolution |date=June 2018 |volume=2 |issue=6 |pages=956–961 |doi=10.1038/s41559-018-0528-0 |pmid=29632349 |s2cid=4698765 |doi-access=free |bibcode=2018NatEE...2..956G |hdl=10400.1/11513 |hdl-access=free }}</ref><ref>{{Cite news|url= https://www.independent.co.uk/news/science/human-face-evolution-expressions-eyebrows-forehead-hominins-york-university-a8871176.html|title= Human face evolved to help us communicate emotions, scientists say|date= 15 April 2019}}
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