Without plugin?
Write a code right now or the easiest way go to http://wordpress.org/plugins/infinite-scroll/ , download and copy paste the code in your theme.
Like brasofilo said. Every PHP function that enhances WP functionality is a plugin.
Without plugin?
Write a code right now or the easiest way go to http://wordpress.org/plugins/infinite-scroll/ , download and copy paste the code in your theme.
Like brasofilo said. Every PHP function that enhances WP functionality is a plugin.