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Everybody agrees the Pacific is the big daddy of Earth's oceanic family, but how well do you know this enigmatic ocean? Test your sea legs by taking this quiz.
When it comes to fossils, specimens like Sue the Tyrannosaurus rex grab much of the attention. And while Sue is a staggering 67 million years old, she's a new kid on the block, compared to some of the oldest fossils ever found. What's older than Sue?