In their present form, or a least something like it, around the 4,000,000 yrs mark.
how long has archaebacteria been on earth? how long has archaebacteria been on earth?
they have been on the earth for along time
forever it was on earth when the earth was made
They have been on earth since 190 million years ago.
for as long as it has had continents
long time
A very long time.
Well it depends on what you mean. The distance for how long it takes, or the time as in how long since Earth was made. Earth as you know has been here a long long time. Stars light has been shinning towards Earth eversince it was made. To see how long it takes for a stars light to reach Earth depends on how distant and huge the star is.
i have been on this earth for 8 years
guinea pigs been on earth more than 3,000 years by:taliyah
1 second
It has always been in use in our bodies as long as we have been on this Earth.