Scientists are using a small piece of DNA as a molecular bar code, a unique identifier to separate organisms into species. Skip to content Subscribe or renew today ...

Train Your Mind, Change Your DNA. Published Jul 01, 2008 at 8:00 PM EDT Updated Nov 07, 2017 at 2:26 AM EST. By Sharon Begley . Newsweek Is A Trust Project Member. FOLLOW. analysis.

Law-enforcement agencies rely on DNA data to solve many difficult cases, and although 23andMe says it requires a warrant to share data, some other companies have granted broad access to police.

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