In 2001, the Human Genome Project international consortium published a first draft and initial analysis of the human genome sequence. At the same time, Craig Venter and colleagues working at Celera Genomics Corporation published another version of the human genome sequence. A wealth of information was obtained from the initial analysis of the human genome draft. For instance, the number of human genes was estimated to be about 30,000 (later revised to about 20,000). Researchers also reported that the DNA sequences of any two human individuals are 99.9 percent identical.