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Which came first, Planet Earth or life (as we know it)? http://t.co/sDtOZ7MGLL #evolution #aliens
Which came first, Planet Earth or life (as we know it)? http://t.co/sDtOZ7MGLL #evolution #aliens
@RickLStevens @papersapp the title is short yet appealing: "Earth before life" http://t.co/txX7k9zQOl