Does race determine how many Zzz's you need?

Some of us require a full night's sleep, while some of us consider a "full night" less than four hours. It has a lot to do with lifestyle, but a new poll released by The National Sleep Foundation found that it also has a lot to do with race. Of all surveyed, African-Americans reported needing the least amount of sleep. Interesting or obvious? Either way, the full story can be found here.