North Korean researchers have discovered a 620,000,000-year-old fossil of a tubular animal, the first organism with skeletal structure on Earth, the state media reported on Sunday.
Researchers from the geology faculty of Kim Il Sung University excavated the fossil of the tubular animal in the Proterozoic era of North Hwanghae province, the Korean Central News Agency (KCNA) said in a report.
According to the report, the tubular animal was the first organism with skeletal structure on Earth. It was an elliptic tube-shape animal with nothing in abdomen.
The researchers said they found fossils of primitive seaweeds and primitive jellyfish belonging to the period of transition from one-cell to multi-cell in 2001.
During their recent in-depth research into the fossil, they discovered the fossil of the 5 cm-long tubular animal again on the same stratum, Xinhua news agency quoted KCNA as saying.
The excavation of the fossil helps towards solving the crustal formation in a scientific way and concretising the evolution process of organism, the report said.