Mary Anning finds the sea's monsters
A self-taught fossil hunter rewrites what the past could hold
Quick facts
- Born
- 1799, Lyme Regis
- 1811
- Discovered Britain's first identified ichthyosaur skeleton, age 12
- December 1823
- First complete Plesiosaurus skeleton; doubted at first, then confirmed
- Recognition
- Excluded from the Geological Society meeting about her own find
What happened
Mary Anning was born in 1799 in Lyme Regis, on England's Jurassic Coast, and became one of the most consequential fossil hunters in the history of the science, working outside the scientific establishment of her time. In the autumn of 1811, when she was twelve, she and her brother Joseph found Britain's first identified ichthyosaur skeleton. In December 1823 she went further, discovering the first complete skeleton of a Plesiosaurus, a marine reptile whose name means near to reptile. The find was so strange that a special meeting was called at the Geological Society of London to examine it, and the French anatomist Georges Cuvier initially doubted it was even genuine, suspecting a fabrication, before further evidence convinced him it was real. Anning herself was not invited to that meeting about her own discovery. She died of breast cancer in 1847, still in financial strain despite a lifetime of major scientific finds.
Why it matters
Anning's marine reptile discoveries, made a generation before the word dinosaur existed, helped convince the scientific world that entire kinds of animal utterly unlike anything alive today had once existed, laying the groundwork for the paleontology that followed, including the different, land-based fossils that Richard Owen would later group as the dinosaurs. She did this as a working-class woman shut out of the institutions built to study her own discoveries.
How we know
The Natural History Museum's account of Mary Anning gives her birth year and location, the 1811 ichthyosaur discovery with her brother, the December 1823 plesiosaur find and Cuvier's initial doubt and the Geological Society meeting she was excluded from, and her death in 1847 in continued financial hardship.
Sources
- University of California Museum of Paleontology. Mary Anning (1799-1847) (University of California Museum of Paleontology) · Reputable sourceucmp.berkeley.edu · The domain "ucmp.berkeley.edu" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
- Natural History Museum, London. Mary Anning: the unsung hero of fossil discovery (Natural History Museum) (2024) · Reputable sourcenhm.ac.uk · The domain "nhm.ac.uk" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
See something wrong? . Corrections with a source get fixed fastest.
Part of a timelineAge of Dinosaurs21 events · The age of the dinosaurs across the Mesozoic Era, from the Great Dying that cleared the way to the asteroid that ended their reign.View all →