There’s not an “older entries” link at the bottom of my site.

my site: https://www.the-heap.com

Hi,

Once you go to the site and scroll to the bottom you’ll see that there’s not an “older entries” link at the bottom. I do have categories on the side and achieves (history), but some people don’t pay attention to that. Instead they click on “older entries” once running out of posts their interested in. So, I would like to have the link at the bottom of the page. I’ve read other posts and changed how many posts show up on the main page to only three then back to ten, but still the link didn’t appear. Any and all advice would be help to getting that link to appear. Thank you.