I've often wondered how accurate such things are because, well, I just don't know enough about physiology to venture a guess. I mean how could they possibly know how big the guy's nose was, for example? Maybe they can't. It seems that while it's probably a fairly accurate portrayal, there is still some guesswork:
Quote:
The researchers couldn't determine how fatty Harwa's face was — they just had to go with their best guess on that part of the reconstruction. But they could figure out how muscular it was, based on the muscle insertions visible on the virtual skull bones. The mummy's soft-tissue profile also helped with the reconstruction, particularly around the nose, mouth and ears.
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Still really cool stuff, though.