Esteban Sarmiento is a primatologist and biologist. He is noted for his work in primate anthropology and for appearing on the Monster Quest television series.

Sarmiento earned a biological anthropology Ph.D. in 1985, and from then until at least 2008, he worked as a research associate at the American Museum of Natural History.

His primary field of study is the skeletons of hominoids, including both extinct and living species. From 2002 to 2004, he was a Fulbright scholar teaching physiology at Eduardo Mondlane University in Mozambique.

He heads The Human Evolution Foundation, whose primary goal is to understand humanity’s place in nature.

Sarmiento is one of the few mainstream experts to give serious attention to cryptozoology, particularly Bigfoot’s reports.

Esteban does not suggest that Bigfoot’s existence has been established, but that its existence is possible and that claims and evidence deserve careful scrutiny. He has stated, “If the animal in the P&G film is real, this animal is exceedingly human like... it would be our closest relative on earth.”