On Thursday, as a National Geographic expedition was exploring the waters around the Solomon Islands, its members spotted something that looked like a shipwreck underwater. “Just when we think there is nothing left to discover on planet earth,

The world's biggest coral — an organism made up of about a billion polyps — is about three times bigger than the previous record-holder and was discovered by chance during an expedition off the Solomon Islands.

Scientists say they have found the world's largest coral near the Pacific's Solomon Islands, announcing Thursday a major discovery "pulsing with life and colour".