John Robert Horner (born June 15, 1946) is an American paleontologist best known for his research on dinosaurs. Horner has made a career as a researcher and teacher, having worked at various scientific institutions regardless of an initial lack of a university-level degree. In 1979, Horner and fellow paleontologist Bob Makela described for the first time the duck-billed dinosaur Maiasaura. Their research on Maiasaura provided the first clear evidence that some non-avian dinosaurs cared for their young. Horner has gained popularity among the public as a figure of authority within the field of paleontology, he has published over 100 professional papers, has authored 12 books, numerous articles, and featured in numerous documentaries. He has raised controversy too, leading him, twice in his life, to depart prestigious scientific institutions. In particular, in 2016, he quit the Montana State University and the Museum of the Rockies after having married in 2012, when he was 65, a 19-year old undergraduate student, 46 years his junior, and in 2026 he quit his employment at Chapman University when early that same year it was publicly unveiled that he was mentioned in the Epstein files. Horner served as the technical advisor for the first five Jurassic Park films, which greatly contributed to increase his popularity. He served as a partial inspiration for one of the lead characters of the Jurassic Park franchise (Dr. Alan Grant), and he even had a cameo appearance in one of the franchise's films, Jurassic World, in 2015.
Early life and education Horner was born on June 15, 1946 to John Horner, the owner of a sand-and-gravel business, and Miriam Horner (née Whitted), and raised in Shelby, Montana. He has a brother, Jim Horner, and a younger sister, Rosemary Horner. Horner acquired the nickname "Jack" at an early age. He was 8 years old when he found his first dinosaur bone. Due to severe dyslexia (though he didn't learn about his condition until 1976, when he was already working at Princeton University) he struggled throughout his high school career at Shelby High School, but managed to graduate in 1964. That same year, he enrolled at the University of Montana where he majored in geology and zoology. Having failed his first year, Horner left the university in 1965 and was drafted by the United States Marine Corps. He served in the Vietnam War from 1966 to 1968. Immediately upon his return from Vietnam, he reapplied at the University of Montana. However, he was held back by various required courses, and flunked out again. Between 1964 and 1973, Horner flunked out of the University of Montana seven times before abandoning his pursuit of a university degree. After this, he helped run the family sand-and-gravel buisiness for two years, during which he regularly sent letters to scientific institutions looking for a job, until he was admitted as a preparator at Princeton University (New Jersey) in 1975.
Scientific career
At the time of his first professional scientific employment at Princeton, Horner already had years of experience prospecting for fossiliferous sites with his research partner and friend Bob Makela since the mid 1960s. While Horner was working at Princeton, he and Makela kept prospecting together in north-western Montana during the Summers. In 1978, they discovered a colonial nesting site of a new dinosaur genus near Choteau, Montana, which they named Maiasaura, or "good mother lizard". The dinosaur bones, originating from a juvenile, were first discovered by Marion Brandvold. Horner then studied the bones and refused to return the bones to Brandvold, eventually leading to a suit against Horner and Yale University. It turned out that the discovered site also contained the first non-avian dinosaur eggs ever discovered in the Western Hemisphere, the first dinosaur embryos, and settled questions of whether some dinosaurs were social, built nests and cared for their young. Because of the quantity of dinosaur eggs and eggshell pieces it contained, the site ended up with the nickname "Egg Mountain". In the late 1970s Princeton closed its paleontology department, which led to Horner joining the Academy of Natural Sciences of Philadelphia for a few years. In 1982, he left Princeton and Philadelphia for Montana State University (MSU) and the Museum of the Rockies (MOR), where he was hired both as a curator and a teacher. Not having obtained a PhD, Horner normally would not have been allowed to teach at MSU, but he received clearance for teaching at higher-education level through the support of Mick Hager, the director of the Museum of the Rockies at that time, and the implementation of the Experimental Program to Stimulate Competitive Research (EPSCoR), which allowed him to obtain the necessary grants. Horner left MSU and the MOR on 30 June 2016 after more than 33 years with the institution, although he claims to have been pushed out after having married an undergraduate student 46 years his junior. That same year, Horner agreed to be a part-time research associate at the Burke Museum of Natural History and Culture to help "fill the museum up with dinosaurs". He started teaching as a Presidential Fellow at Chapman University in Orange, California, that same year. His employment with Chapman University ended in early 2026, although it is unclear whether this split was caused by the controversy surrounding his connections with Jeffrey Epstein.
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