— Scientists at the center of a multimedia maelstrom announced Tuesday that a 47-million-year-old fossil may represent the common ancestor of all primates, ranging from humans and apes to lemurs.
The announcement was unusual on several counts — including the fact that it was based on a fresh analysis of a specimen that was collected a quarter-century ago, and the marshaling of marketing forces to capitalize on the research's publication in the journal PLoS ONE. Among the products keyed to the find are a book, a TV documentary to be aired internationally and showings at several museums around the world.
The discovery was touted in advance as a "revolutionary scientific find that will change everything" — a contention almost certain to be disputed as other evolutionary scientists review the research.
In the study, a team led by University of Oslo paleontologist Jorn Hurum reports that the specimen, found in Germany's Messel Pit in 1983 by a collector, is "the most complete fossil primate ever discovered." Hurum arranged for the specimen to be purchased two and a half years ago at an undisclosed price, and recruited fellow scientists to analyze the fossil.
The researchers said that creature was female, estimated at about 9 months old, 2 feet (60 centimeters) long and weighing less than 2 pounds (1 kilogram) in life.
The fossil, which was given the scientific name Darwinius masillae and was nicknamed Ida, has some of the attributes of monkeys and apes as well as lemurs — including an opposable thumb, the researchers said. Its last meal of fruit, seeds and leaves remained in its stomach cavity, implying that the animal was a herbivore.
The researchers speculated that Ida could represent a "stem group" from which today's primates, including humans, evolved — "but we are not advocating this," they added.


