1. A computer-implemented method comprising: receiving, from a client device of a requesting user of a social networking system, a request for a content item associated with one or more comments representing information provided by users of the social networking system; calculating an interest score for each of the comments associated with the content item, the interest score representing a measure of the requesting user's interest in a comment; selecting a comment for presentation to the requesting user based at least in part on the calculated interest scores; responsive to the selected comment having a plurality of replies to the comment, calculating for each of the plurality of replies an interest score representing a measure of the requesting user's interest in the reply, each of the plurality of replies by a user of the social networking system; selecting a subset of replies from the plurality of replies based at least in part on the interest scores; determining an order to present the subset of replies based at least in part on the interest scores calculated for the subset of replies; transmitting instructions to the client device to present the selected comment and to present the selected subset of replies in the determined order and in association with the selected comment; and responsive to receiving a request from the requesting user to view the plurality of replies, transmitting an instruction to the client device to present the plurality of replies in a chronological order based on a time associated with each of the plurality of replies.