While walking with her sister Ellen one day in October of 1910, Mignon came across a gravel pit. Recount this amazing discovery http://www.mtholyoke.edu/~dalbino/books/lester/dinosaur.html
While walking with her sister Ellen one day in October of 1910, Mignon came across a gravel pit. Recount this amazing discovery http://www.mtholyoke.edu/~dalbino/books/lester/dinosaur.html