The researchers discovered that the molecular fossils indicating the presence of these primitive eukaryotes were commonplace in rocks spanning from about 1.6 billion years ago to 800 million years ago. "It is a lost world in the sense that we had not been able to see or detect them - although there was an entire world of them. It is a lost world also because these forms are now entirely extinct, Brocks added. The oldest of the rocks bearing these fossils were unearthed in the remote Outback of northern Australia, near Darwin. Scientists long were puzzled about the seeming absence of molecular fossils from this time span indicative of primitive eukaryotes.

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Persons: Jochen Brocks, geobiologist Jochen Brocks, Benjamin Nettersheim, Brocks, sapiens, Konrad Block, Will Dunham, Rosalba O'Brien Organizations: Australian National University, Handout, REUTERS, University of Bremen, Thomson Locations: Creek, Northern Australia, REUTERS WASHINGTON, Canberra, Germany, Australia, Darwin