Great Barrier Reef coral in 2010 (IMAGE)
Caption
Coral reefs grow in shallow waters where they remain covered by the sea but still receive sunlight. The remains of ancient reefs were examined to determine sea levels from long ago by a research team led by University of Tokyo Professor Yusuke Yokoyama.
Credit
Image by Hironobu Kan
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Re-use only with attribution to Hironobu Kan. Creative Commons license CC BY-ND.
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