Archaeologists find 5,500 year old plaza in Peru
LIMA (Reuters) - A circular plaza built 5,500 years ago has been discovered in Peru, and archaeologists involved in the dig said on Monday carbon dating shows it is one of the oldest structures ever found in the Americas. feeds.reuters.com
Man-made molecules reverse liver cirrhosis in rats
HONG KONG (Reuters) - Scientists in Japan have designed artificial molecules that when used with rats successfully reversed liver cirrhosis, a serious chronic disease in humans that until now can only be cured by transplants. feeds.reuters.com