Time's Oldest Debate According to recent studies, planet earth formed approximately four and a half billion years ago. Since then, the earth has undergone many evolutionary changes. Earth began as a swirling gas which condensed to create an immense land mass. The ancient earth was basically the same as today's earth except for the environment. The atmosphere of the ancient earth was quite different, containing more carbon and nitrogen gases than oxygen. The former atmosphere …showed first 75 words of 1289 total…

…showed last 75 words of 1289 total…