I disagree strongly with the assertion that Tellus is more common than Gaia I ve NEVER heard or read of Tellus used to mean Earth except in some Roman mythology stories while I often encounter Gaia referring to the ecology or spirit of Earth in popular green and scientific ecologic term not that I agree that it is a scientific term A google search of Gaia Earth gave me 159 million hits while Tellus Earth gives 102 million most of the latter seem to refer to companies with that name 173 189 78 87