News 66-million-year-old triceratops skeleton, world’s biggest, sells for $7.7 million October 22, 2021 Associated Press Comments Off on 66-million-year-old triceratops skeleton, world’s biggest, sells for $7.7 million The world's biggest triceratops skeleton, known as "Big John," was sold for $7.7 million to a private collector at a Paris auction house.