NOAA's exploration of deep ocean vents has discovered ecosystems entirely dependent on chemosynthesis rather than sunlight.
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The siphonophore can grow to extraordinary lengths in the ocean depths.
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The Arctic Ocean may be ice-free in summer within decades, creating new shipping routes and accelerating warming.
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The tallest mountain from base to peak is Mauna Kea in Hawaii — it's just mostly underwater.
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The ocean contains structures larger than mountain ranges.
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