Zhongjianornis an enlarged, keeled breastbone in more advanced birds. However, later analysis of the anatomy of "Z. yangi" cast doubt on this interpretation of the bird as very primitive. Research published in 2012 found that some of the apparently primitive features were due to poor preservation of the bones, and that "Zhongjianornis" is more similar in anatomy to primitive euornitheans like "Chaoyangia" and "Schizooura". A phylogenetic analysis showed that a very primitive position in the bird family tree for "Z. yangi" is unlikely given current evidence. Zhongjianornis Zhongjianornis is a genus of beaked, pigeon-sized birds from the early Cretaceous period of
What a Difference a Day Makes (Grey's Anatomy) What a Difference a Day Makes (Grey's Anatomy) "What a Difference a Day Makes" is the twenty-second episode of the fifth season of the American television medical drama, "Grey's Anatomy" and the show's 100th episode overall. Written by series creator Shonda Rhimes and directed by Rob Corn, the episode was originally broadcast on the American Broadcasting Company (ABC) in the United States on May 7, 2009. "Grey's Anatomy" centers around a group of young doctors in training. In this episode, a wedding takes place. The episode received generally favorable reviews. The initial airing was viewed by 15.326 million people and