Hair microscopy — which uses a microscope to compare two different hair samples — is cheaper than DNA testing, but a 2009 report in the National Academy of Sciences called the technique ...

Still, hair microscopy became instrumental in more than 20,000 cases before the year 2000 and led to countless convictions. For decades, ...

By the mid twentieth century, the FBI’s crime lab had begun training experts in comparative hair techniques. This specifically involved examining strands of hair, side by side under the microscope, ...

Hair microscopy is a pattern comparison discipline where forensic analysts are trained to look at patterns and similarities in pieces of evidence, Moyes said.

Your hair says a lot about you, and not just because of how you style it. Tests on your hair can reveal your DNA, drugs you’ve taken, and toxins you’ve been exposed to.

An estimated 30 million women in the U.S. are losing their hair. A top dermatologist explains the condition and lays out treatment options.