World ‘Big as a car’: Scientists reveal discovery of 326-million-year-old giant millipede fossil December 21, 2021December 26, 2021Jordan Mendoza, USA TODAYComments Off on ‘Big as a car’: Scientists reveal discovery of 326-million-year-old giant millipede fossil The discovery of the Arthropleura fossil, measuring nearly 9-feet-long, possibly makes this giant millipede the largest bug to ever exist.