How long has the human race including all human form been on the Earth?

Question

As well when did they first appear on the Earth

Answer 1

We walked upright about 1.8 million years ago. We became anatomically modern by between 130,000 and 200,000 years ago.

Answer 2

go to http://news.bbc.co.uk/2/hi/science/nature/4269299.stm

it states that modern human race is 195,000 years old

and just for FYI, our presents has only been about 5/8 of a second long on the geologic clock of the Earth, but we have had the most damaging effect off all