You'll find everything from birth/death/marriage certificates to yearbook photos and beyond when you use a genealogy service. One of the most popular types of genealogical records is the US Census, which documents every household in the nation every 10 years. You can often find details about your relatives' educational level, income, how many children they had, and how long they had been married at the time. Even documents like draft registration records can tell you a person's height, weight, hair and eye color!