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Satellite images of the mouth of the Amazon show brick-red tendrils of water spilling into the deep blue of the Atlantic. The sediment-laden freshwater billows and plumes in the salty ocean. But up close, this place is muddy and opaque, the water darkened by sediments picked up during the river's nearly 4,000-mile journey across the continent. It's an unlikely home for coral - a famously fragile form of life. Nevertheless, scientists have found a massive coral reef here. [Source: Washington Post]
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