The workplace is highly varied, and actors need to be flexible with regard to where they work and the type of environment they work in. Those prepared to work in all kinds of different situations and who are able to adapt to their different environments will be more successful in finding their niche. A successful career in acting requires equal parts talent and practice with a bit of luck thrown in. Actors at work can be seen and heard everywhere: TV, the big screen, the theater, on the Internet, in videos and on podcasts. They portray characters from the past that have impacted history, and they portray characters that are destined to impact pop culture in the future. Some dabble in a variety of entertainment mediums, while some stick to the stage, use their voice to create new worlds or dedicate their lives to the silver screen. Some make up the cast of extras that round out a production, while some achieve levels of fame that makes them a household name.