Titan: A Tale of Two Planets
Titan: A Tale of Two Planets
As we search for extraterrestrial life, Earth in some sense always provides our
framework. The data indicate that life does in fact exist on this planet, and
it existed here sometime before about 3.5 billion years ago (give or take a
couple hundred million years). However, thanks to plate tectonics and other
pesky processes, we're missing some critical information about this early time.
This includes information about how life got started on Earth.
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