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They can also detect tuberculosis, an infectious disease that commonly affects the lungs, far quicker than it would be found in a lab using conventional microscopy, Apopo says.

A post-mortem examination gave a cause of death as "gunshot wound to left chest, involving heart and left lung pending toxicology and microscopy".

The team used imaging with x-rays and electron microscopy to conclude that the brain must have been heated to at least 510C before cooling rapidly.

The study of the archaeological remains was carried out by applying advanced microscopy and biomolecular analysis techniques, which combine protein and lipid analysis.

Unlike other methods to analyze protein structure such as mass spectrometry or cryo-electron microscopy, cryo-electron tomography enables researchers to observe proteins in their native environment.