PETER MENZEL / SCIENCE PHOTO LIBRARY PETER MENZEL / SCIENCE PHOTO LIBRARY
Forensic science. Scientists in the serology laboratory of the Federal Bureau of Investigation (FBI). At left, the scientist is examining a handgun (0.357 magnum) for traces of blood. At right, the scientist is dissolving a blood clot to allow it to be analysed for blood group or more specific DNA sequencing. The laboratory is in Washington DC, USA.
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