user19521: Why has this question been bumped by the community six times? 
To me this makes no sense, why would an "ordinary" question be bumped so many times, and therefore appear in the activesection repeatedly? 

user3624: It was bumped since it was an upvoted question that lacked an upvoted answer before Oct 22. See also this post in Meta-SE on reasons for bumping questions.

19521: <p>Why has <a href="https://biology.stackexchange.com/questions/45568/spatial-dimensions-for-an-animal">this</a> question been <a href="https://biology.stackexchange.com/posts/45568/revisions">bumped by the community</a> six times? </p>

<p>To me this makes no sense, why would an "ordinary" question be bumped so many times, and therefore appear in the <code>active</code>section repeatedly? </p>
 3624: <p>It was bumped since <a href="https://meta.stackexchange.com/questions/184485/community-seems-to-be-bumping-new-questions-more-frequently-than-usual/184511#184511">it was an upvoted question that lacked an upvoted answer</a> before Oct 22. See also <a href="https://meta.stackexchange.com/questions/48578/what-can-cause-a-question-to-be-bumped">this</a> post in Meta-SE on reasons for bumping questions.</p>
