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What causes the tides?
Why are they so predictable? And sometimes so weird?
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Tidal weirdness
Why do tide cycles take 24 hours and 50 minutes? What is a neap tide? And other curiosities.
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Gallery of oceans
Our watery world, from within and from above.
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Wild Weather Adventure
Explore Earth and its wild weather in your weather research blimp. Beat the computer, or up to three friends.