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Timothy G. Bromage

American Paleoanthropologist From Wikipedia, the free encyclopedia

Timothy G. Bromage
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Timothy G. Bromage is an American paleoanthropologist, professor of biomaterials and director of the Hard Tissue Research Unit at the New York University College of Dentistry.[1] He is known for his work in human evolution through hard tissue biology, including the reconstruction of life histories from bone and tooth microstructures, the introduction of the Havers-Halberg Oscillation (a multidien biological rhythm regulating mammalian growth and metabolism),[2] and fossil discoveries in Malawi, such as the oldest known specimen of Homo rudolfensis.[3] Bromage has developed imaging technologies for paleontological research and holds patents for innovations in microscopy and elemental analysis.[4][5] His research spans anthropology, biology, and materials science, earning him awards including the 2010 Max Planck Research Prize for life sciences.[6] He is an elected fellow of the American Association for the Advancement of Science.[7]

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Early life and education

Details about Bromage's early life are not widely documented in public sources. He earned a Bachelor of Arts degree in anthropology, biology, and geology from California State University, Sonoma in 1978.[1] He pursued graduate studies at the University of Toronto, obtaining a Master of Arts in biological anthropology in 1980 and a Ph.D. in the same field in 1986 under Professor Becky Sigmon. His doctoral research focused on comparative scanning electron microscopy of facial growth and remodeling in early hominids, with the later stages completed in the Department of Anatomy and Embryology at University College London under Professor Alan Boyde.[1]

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Academic career

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Bromage began his postdoctoral work with a NATO Postdoctoral Fellowship in Science in 1986–1987 at University College London, followed by a fellowship in the Department of Child Dental Health at London Hospital Medical College in 1987–1988. In 1989, he joined the Department of Anthropology at Hunter College, City University of New York (CUNY), where he advanced from assistant professor to full professor by 1998. During this period, he established the Hard Tissue Research Unit (HTRU), a digital light and electron microscopy facility dedicated to mineralized tissue biology.[1]

In 2004, Bromage relocated the HTRU to the New York University College of Dentistry, where he serves as a tenured full professor in the Department of Molecular Pathobiology (formerly Biomaterials and Biomimetics). He holds adjunct professorships in NYU's Department of Anthropology and the Institute for the Study of the Ancient World, as well as honorary positions at La Salle University in Madrid (since 2010) and the Senckenberg Research Institute (since 2010).[1] Bromage has mentored students and collaborated internationally, with funding from agencies including the National Institutes of Health (NIH),[8] National Science Foundation (NSF),[9] Max Planck Society, and Alexander von Humboldt Foundation.[1]

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Research

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Bromage's research focuses on hard tissue biology (bone, enamel, and dentine) to reconstruct organismal life histories, metabolism, and ecology in both extant and extinct species. His work integrates microscopy, metabolomics, and fieldwork to explore how physiological and environmental signals are preserved in mineralized tissues. As of 2025, his publications have garnered over 8,700 citations with an h-index of 53.[10][11]

Hard tissue microstructures and life history

Bromage developed the use of scanning electron microscopy and confocal microscopy to study bone remodeling and dental microstructures in fossil hominins. In a 1985 study with M.C. Dean, he reevaluated the dental development of immature fossil hominids, showing that early humans had shorter growth periods similar to modern apes.[12][13][14] This work emphasized biological rhythms in enamel striae of Retzius as markers of growth patterns and rates.

He identified lamellar bone as an incremental tissue, reconciling enamel rhythms with body size and life history across mammals. In 2009, Bromage introduced the Havers-Halberg Oscillation (HHO), a multidien biological rhythm (typically 5–9 days) regulating cell proliferation, apoptosis, and protein synthesis, which correlates with body mass, metabolism, and life history traits.[2][15] Experimental confirmation came from metabolomics studies on swine plasma, revealing oscillations linked to growth functions.[16]

Fieldwork and fossil discoveries

Bromage co-authored studies on the paleoecology and paleobiogeography of the Chiwondo Beds, reconstructing faunal and environmental contexts for Late Pliocene early hominids in the Malawi Rift.[17][18] In 1992, the team discovered a 2.4-million-year-old mandible (UR 501) in the Chiwondo Beds, identified as the oldest known Homo rudolfensis.[3][19][20]

Metabolomics and paleometabolomics

Bromage's recent work includes paleometabolomics to profile ancient ecosystems and metabolomes from the bones and teeth of fossil mammals, funded by the L.S.B. Leakey Foundation, and to study the effects of microgravity from the bone metabolomes of mammals flown aboard the Space Shuttle, funded by NASA.[1]

Innovations and patents

Bromage holds a U.S. patent for a portable confocal microscope (2007), developed for non-destructive imaging of fossil microstructures in paleoanthropology,[21][22] and a method for simultaneous detection of 71 elements in liquid samples (2020).[4][5]

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Awards and honors

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Art and exhibitions

Bromage's photomicrographs of hard tissues have been exhibited internationally, combining scientific imaging with artistic presentation.[27] Notable exhibitions include:

  • "The Microscope and the Skeleton: A Digital Photomicrography of Hard Tissues" (2002), Bertha and Karl Leubsdorf Art Gallery, New York[27]
  • "Óseos Cosmos: The Shapes of Time" (2004–2007), venues in Spain, Italy, and Crete[27]
  • "Tissue-Patterns" (2005–2006), Museo de Teruel and La Casa Encendida, Spain[27]
  • "Hezur Muinetal: Óseos Cosmos" (2009), Kubo-Kutxa Gallery, San Sebastian, Spain[27]
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Selected publications

  • Bromage, T.G.; Dean, M.C. (1985). "Re-evaluation of the age at death of immature fossil hominids". Nature. 317 (6037): 525–527. Bibcode:1985Natur.317..525B. doi:10.1038/317525a0. PMID 19093314.
  • Schrenk, F.; Bromage, T.G. (1993). "Oldest Homo and Pliocene biogeography of the Malawi Rift". Nature. 365 (6449): 833–836. Bibcode:1993Natur.365..833S. doi:10.1038/365833a0. PMID 8413666.
  • Bromage, T.G. (2009). "Lamellar bone is an incremental tissue reconciling enamel rhythms, body size, and organismal life history". Calcified Tissue International. 84 (5): 388–404. doi:10.1007/s00223-009-9221-2. PMID 19234658.
  • Bromage, T.G.; Schrenk, F. (1999). African Biogeography, Climate Change, and Human Evolution. Oxford University Press. ISBN 978-0-19-511437-9.
  • Bromage, T.G. (2016). "The swine plasma metabolome chronicles 'many days' biological timing and functions linked to growth". PLOS ONE. 11 (1) e0145919. doi:10.1371/journal.pone.0145919. PMC 4703299. PMID 26735517.
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References

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