NASA has made a video of what Mars looked like four billion years ago. A little craggier, not so worn down, but not much different than it looks today -- give or take the oceans.
If you were expecting lush greenery, stop and think a minute -- four billion years ago, there wasn't life on Earth yet. In fact, Earth probably looked a lot like Mars. One thing -- the article mentions an "oxygen-rich atmosphere" a billion years before Earth's developed. Last I heard, free oxygen on Earth was the byproduct of early bacteria, causing the first mass extinction -- everything before that was anaerobic. So I wonder what produced the oxygen on Mars.
Via Towleroad.
If you were expecting lush greenery, stop and think a minute -- four billion years ago, there wasn't life on Earth yet. In fact, Earth probably looked a lot like Mars. One thing -- the article mentions an "oxygen-rich atmosphere" a billion years before Earth's developed. Last I heard, free oxygen on Earth was the byproduct of early bacteria, causing the first mass extinction -- everything before that was anaerobic. So I wonder what produced the oxygen on Mars.
Via Towleroad.
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