No one knows, for as long as people have been on the earth it has been there in the sky.
hippos bean around earth
Earth has been broadcasting radio signals into outer space since the late 1800's.
ATP has been used as long as there have been living things on Earth. It developed with the earliest anaerobic prokaryotic cellular life. Probably slightly more than 3 billion years, not long after the crust of the Earth first began to solidify and liquid water became available.
Life on Earth is estimated to have existed for around 3.5 billion years. This means that life has been present on Earth for a vast majority of its 24-hour "day."
how long has archaebacteria been on earth? how long has archaebacteria been on earth?
they have been on the earth for along time
They have been on earth since 190 million years ago.
long time
for as long as it has had continents
A very long time.
i have been on this earth for 8 years
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.
guinea pigs been on earth more than 3,000 years by:taliyah
since the earth began its existence
Cotton has been 'used' as long as cotton has grown upon the Earth.
Forever.