The February edition of Gondwana Research, an international journal, has published the study by the researchers. Discovered: India's only fossil of world's oldest animal | Photo Credit: BCCL Dickinsonia, one of the rarest fossils in the world, has been discovered in Madhya Pradesh's Bhimbetka rock shelters, about 40 kms away from the city of Bhopal. Dickinsonia is an extinct genus of a basal animal that lived during the late Ediacaran period. The fossils are known only in the form of imprints and casts in sandstone beds. Researchers believe they have found Dickinsonia that dates back 570 million years on the roof of the 'Auditorium Cave' at Bhimbetka.