Just one or two small drinks, then I can drive home.Guesstimates like this tend to end badly, since people who are accustomed to alcohol often underestimate their own blood alcohol level, says Dr Ivo ...

Humans first evolved as a distinct species, Homo sapiens, around 300,000 years ago in Africa. In terms of biological time, we are a young species on this planet-- an unfinished animal, our evolution ...