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 ...

The discovery of the marble-sized balls comes just months after a similar incident in October of last year, where thousands of washed-up black balls led to the closure of Bondi Beach, among other ...

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 or ...

Nine beaches, including popular spots Manly and Dee Why, were closed on 14 January after the marble-sized balls started washing up. It came months after thousands of black blobs started appearing ...