ReutersOSLO — A pre-Viking woolen tunic found beside a thawing glacier in south Norway shows how global warming is proving something of a boon for archaeology, scientists said on Thursday.The greenish-brown, loose-fitting outer clothing — suitable for a person up to about 5 feet, 9 inches tall (176 centimeters) — was found 6,560 feet (2,000 meters) above sea level on what may have been a Roman-era...