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A vast “raft” of volcanic rocks stretching over 150 sq km (93 sq miles) is drifting through the Pacific Ocean, scientists say.
The sea of pumice – the size of 20,000 football fields – was first reported by Australian sailors earlier this month.
Experts say the mass likely came from an underwater volcano near Tonga which erupted around 7 August according to satellite images.
Sailors have been warned to stay clear of the potential hazard. Read more