it's obvious that at some point in dinosaur times it was mere meters away from the Earth surface Is there some particular reason under the Hacker News guidelin

it's obvious that at some point in dinosaur times it was mere meters away from the Earth surface Is there some particular reason under the Hacker News guidelines http://ycombinator.com/newsguidelines.html http://ycombinator.com/newsguidelines.html as interpreted by the Hacker News welcome message http://ycombinator.com/newswelcome.html http://ycombinator.com/newswelcome.html that this is the top comment under this thread? This prompted me to look up other comments by the same user. http://news.ycombinator.com/threads?id=abcd_f http://news.ycombinator.com/threads?id=abcd_f AFTER EDIT: Just as an example of what I think is a helpful link to share in a Hacker News thread, here are new journalistic reports, "Mammal ancestry expanded after dinosaurs died off," http://www.usatoday.com/story/tech/2013/02/08/mammal-ancestor-dinosaur/1900207/ http://www.usatoday.com/story/tech/2013/02/08/mammal-ancesto... and "Rat-Size Ancestor Said to Link Man and Beast" http://www.nytimes.com/2013/02/08/science/common-ancestor-of-mammals-plucked-from-obscurity.html http://www.nytimes.com/2013/02/08/science/common-ancestor-of... about scientific investigation into the most recent common ancestor of placental mammals.