A giant raft of volcanic rocks the size of Manhattan is floating in the Pacific Ocean, headed toward Australia. Scientists believe an underwater volcano near the island of Tonga erupted, sending the chunks of pumice -- a substance which naturally floats -- to the surface. It's not one big chunk, but millions of small pieces, floating in formation.
While this might sound like a disaster in the making, quite the opposite is true. Scientists say this rock will end up being a home to many sea organisms and could help the recovery of the Great Barrier Reef, which has been permanently damaged by climate change. (The Sydney Morning Herald)