Since the first human genome sequence was published, thousands of people have submitted their DNA for scientific analysis. They made these donations anonymously—or so they thought. Now, using publicly available information, researchers found they could figure out the identities of 50 individuals who had loaned their genes to science. Their results, although not the names of the people, are in the journal Science. Biomedical research depends on the human subjects, and issues of privacy have always been a concern. When scientists share genomic data, they first strip away identifying information, like the individual's name and date of birth. But is that really enough? Researchers looked at a specific set of markers in genomes whose sequences were in a public database. And they found that by matching up these markers with sequences that people had submitted to genealogy web sites.