how can I just see all posts in order that they are posted?

if i click on home my first post if from 20 minutes ago, if I click on "new" my first post is from 15 minutes ago but if I click on "topics" and then on "fun" or " random" my first post is from 2-3 minutes ago. why is it so complicated? the only way I found to not miss any post is to go to topic and click each topic one by one. its ridiculous.