https://www.bbc.com/news/science-environment-59734747
The millipede, known as Arthropleura, is thought to have been more than 2.5m (8ft) long. It would have weighed about 50kg (eight stone).
The fossil segment was first spotted in 2018 when a large block of sandstone fell on to a beach at Howick Bay.
It will be displayed in Cambridge's Sedgwick Museum next year.
"It was a complete fluke of a discovery," said Dr Neil Davies, from Cambridge's Department of Earth Sciences, who has been analysing the 75cm-long fossil.
"The way the boulder had fallen, it had cracked open and perfectly exposed the fossil, which one of our former PhD students happened to spot when walking by," Dr Davies said.
Eight. Feet. Long.