Every horse in the database has a profile page - like the one you see below of Tiznow - with news, races, comments, pedigree, photos and other biographical information. All of this information is entered by users.
You can browse the thousands of horses currently in the database, or search for a specific horse by typing in their name, sire, dam, status, trainer, birth year or sex. If you're searching for Secretariat, just type in 'Secretariat' in the white box below “Name”, and the database will automatically search.
Remember, if the horse you are looking for cannot be found, you can add it using the wiki.