According to new comparisons of human and chimpanzee DNA, we are not as close to our primate cousins as we thought. Scientists have told us that we share 98.5% of our genetic material with chimps, but now it appears that we share less than 95%.
Roy Britten of Caltech was suspicious about the 98.5% figure, even though he invented the technique that produced it. By measuring the temperature at which matching DNA of two species comes apart, you can figure out how different they are. But there are errors inherent in this method, and these produced the higher percentage. By correcting for these errors, Britten came up with the new, lower correlation of 95%.