"So far, most samples identified are marble-sized with a few larger in ... In October last year, spherical objects the size of golf balls appeared on the sands of Sydney's famed Bondi and Coogee ...

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The bulk of the mysterious greyish balls that appeared on Sydney's Northern Beaches were the size and shape of a marble.(Supplied: Northern Beaches Council) ...

"A small number of marble-sized balls mixed in with pumice have also ... Fatbergs can grow to enormous sizes, sometimes weighing several tons and stretching for hundreds of feet.

Months after mysterious black balls forced the closure of some of Sydney's most famous beaches, small marble-like debris has begun washing up on the city's shores again. The balls - this time grey ...

Nine beaches in Sydney, Australia, have been closed after mysterious gray debris shaped like small balls washed up ashore. The discovery of the marble-sized balls comes just months after a similar ...

Mysterious grey balls sparking the closure of nine ... "So far, most samples identified are marble-sized with a few larger in size," a Northern Beaches Council spokesperson said.