Tian Tian (female giant panda) Zoo said was hard to predict and the panda breeding season can last until late September. On 11 September 2017, the Zoo said that Tian Tian was not pregnant and her hormone levels had returned to normal. The coverage of Tian Tian's pregnancies at Edinburgh Zoo became so widespread that BBC Radio 4 current affairs programme PM broadcast satirical daily "Possible Panda Pregnancy Update[s]". Tian Tian (female giant panda) Tian Tian (, meaning "Sweetie") is a female panda born on 24 August 2003 at the Beijing Zoo from mother Niu Niu and father Ying Ying, and currently resident at Edinburgh
Tian "Canopy-Heavens hypothesis" originated from the text Zhoubi Suanjing. The earth is covered by a material tian. "Huntian shuo" (渾天說) "Egg-like hypothesis". The earth surrounded by a tian sphere rotating over it. The celestial bodies are attached to the tian sphere. (See , Chinese creation myth.) "Xuanye shuo" (宣夜說) "Firmament hypothesis". The tian is an infinite space. The celestial bodies were light matters floating on it moved by "Qi". A summary by Ji Meng (郗萌) is in the astronomical chapters of the Book of Jin. Sometimes the sky is divided into "Jiutian" (九天) "the nine sky divisions", the middle sky and