WASHINGTON (Reuters) - Fossils can do a good job of revealing key aspects of an extinct creature: its bones, teeth, claws, even soft tissue like fur, skin, feathers, organs and sometimes remains of its last meal in the gut. Knowing its color has been a trickier question.br clear='all'/img width='1' height='1' src='http://reuters.us.feedsportal.com/c/35217/f/654220/s/4a3bf28e/sc/32/mf.gif' border='0'/div class="feedflare"
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