article_snippet: Shown is a stock image of US soldiers in Iraq in 2003 .
article_snippet: They were then asked to identify symbols in the dark, either moving or still, and to spot individuals moving in a small grove of trees.
article_snippet: The Ce6 subject consistently recognised symbols that did not seem to be visible to the controls,’ the researchers wrote.
article_snippet: And, in the second test: ‘The Ce6 subject identified the distant figures 100 per cent of the time, with the controls showing a 33 per cent identification rate.