Weekly Photos: May 13- 19

The ram Tianjiu, or "Forever", which has survived 61 days after receiving a third-generation artificial heart implant, is fed at a news conference in Tianjin on May 13, 2013. Tianjiu, which has set a survival record for an animal with such an implant, is in healthy condition at the animal laboratory center at TEDA International Cardiovascular Hospital. The implantable device, the first of its kind in China, was developed by the hospital and the China Academy of Launch Vehicle Technology. [Photo/Xinhua]

A sounding rocket flies up into the sky over Shien city in Central China's Hubei province, May 13. [Photo uploaded by Weibo blogger Lilibushifeizhoulaide] Click to read Research rocket mistaken for UFO in China